Your very first step should be therapy/medication. We're all just randos on the internet and won't be able to give the same personalized treatment as someone who spent the better part of a decade studying this stuff.

Healthy habits will also help. Just 2 hours of walking total in a week makes a huge difference. You can carve out 20 minutes a day and take one day off a week, or do it all in one go on a nature hike. Cut out alcohol entirely if possible, it's literally poison and exacerbates mental health issues. Sleep at least 6 hours, cut down on processed junk.

Beyond that I recommend finding local social spaces, like a board game shop, and going there when you feel ready. You could reach out to the owners and see if any special accommodations can be made. The hardest part will be walking in the door - the trick I use is to tell myself I'll just stick around for 1 hour (30 minutes, 5 minutes, whatever you are able) and then leave if I'm having a bad time.

Aside from that, focus on making friends first and often a relationship will organically grow from there. I won't pretend that it's easy, but it's absolutely possible. You are deserving of love and acceptance just as much as anybody else.

Oops I mean your friend lol.

The advice to "just be yourself" is the best advice I can give, but I can elaborate. I should mention that I have severe ADHD, that 70% of ADHDers also have Autism (and that I feel I could be in that 70%), and also have some anxiety disorders too. I am also married and have been in poly relationships in the past. Here's what I didn't do:

• I didn't try to "fake it til you make it" with regards to confidence.
• I didn't follow any playbook. A friend of mine got super into the "[pseudo]science of seduction" which just seemed stupid and cringey so I ignored his advice.
• I didn't approach women in person often, and the few times it did it failed. I was akward, I had a stupid opener, she clearly didn't want to be bothered, so I left (or she left and I didn't follow).
• I didn't try to chat people up at their job.

What I did do:

• thought long and deeply about the places where women would go to meet men. Aside from speed dating and maybe a sex club, I could come up with nothing. Every other place I could think of had issues: market? She's shopping. At work? She's working. At ladies night? Maybe but its possible she's there to party, not to meet guys. School? She's studying.. none of these places were great places to try to meet women.
• decided that I needed to try online dating. Tried a few sites and ended up on ok cupid for a bit. You know, the thing about online dating is that women sometimes go to online dating sites to meet men. I met some women, not all of them ones I connected well with. I had some flings. I was honest and ethical about the fact that I was poly and didn't want to lock anyone into an exclusive arrangement with me.
• I got jealous on occasion, but because I didn't want anyone to "lock me down", it was only fair that I didnt try to lock anyone else down. I worked on my jealousy. I read "the ethical slut" and started to understand and then feel compersion for my partners when they were off with other lovers.
• There was a period in my life where I didn't know better and would start being shitty when hearing the word no, following it up with "please?" Or "why?", but i cut that shit off quickly when it became clear that this behavior wasn't cute nor was it even remotely appreciated.
• I worked at jobs and talked with women as people (e.g. I didn't try to hit on them or be weird around them). Sometimes it was because it was a small company or sometimes a small team. This lead to some great friendships, and parties. A few times at these parties I met women who I later spoke with online and had a sexual relationship later.
• One time I was going to go on a date with a woman later in the week, and later on met a married woman at a party. She wanted some attention, we danced, she talked about her shitty husband and said she wanted to fuck me, so we did after everyone went to bed, under a pop-up canopy during a thunderstorm. Great experience, she was happy and I shared that experience with the woman I had planned on going on a date later, thinking that she, who is also poly would find it exciting. She didn't. She cancelled the date because I helped someone cheat, and that wasn't very ethical. She was right. I didn't mind at the time because her husband sounded like a chode and she wanted to cheat anyway, but it wasn't something I will ever do again. I modified my ethics and behavior after that.
• I went to burning man and was overwhelmed by how many extroverts where there, so I hung out near my tent. I happened to be caming near a woman from another state who was also an introvert. We chatted and hung out together, later hooking up and staying in touch before she became a trumper.
• Another time at burning man, I hung out near a lot near camp (the burn is nice but there are a lot of extroverts!). I met a friend of a friend, asked her if she wanted to watch the spaceship liftoff (an art installation). Just something to do, not expecting or anticipating anything. I was attracted to her but mostly she was just around camp a lot like I was so we built up a small rapport. We watched the thing, went to a club and she asked if she could go down on me. We went back to my tent and hooked up.
• I had driven a woman to burning man and was going to bring her back (rideshare). Long trip and we both wanted to stop at this hotsprings on the way back from the burn. We stopped there both got naked and got in the water. It was dusk, i felt like we had some rapport so I mentioned that I thought she was cute, or something along those lines. She said she didn't feel the same, and I took no for an answer. We later kept in touch and I think I met someone else at one of her parties, but I can't remember, it was a while ago.

In other words, I was myself.. an akward, shy guy with basically zero game. I'm not the kind of guy who is showered with complients for being sexy, even in bed. I'm balding and have a belly. 5' 10".

There really are people for everyone. Give up looking, and just be friendly / friends with women. Find clubs or activities that you enjoy and do those, especially if they are with others. You may just find people who are curious about you and want to get to know you more. Its so much eaiser talking with women when you see and treat them as equals.

Best of luck to you!

I have ADHD, Adderall has changed my life. Treating your mental health with medication and therapy is critical.