As tofr said, you can access almost every instance (and thus any community) from any instance.

But, if you're wanting to sign up for the android instance, and access it through the app Connect, you would do so by opening the left hand side menu, then the three dot at the top of the side screen. Select "add account", then type in the instance name and the rest of your login info.

But. Afaik, you can't sign up via any of the apps currently. You would have to visit the website of the instance and sign up there.

Using Connect for Lemmy, you can login to accounts from any Lemmy instance, not just the 3 your presented with.

Where your home instance is, doesn't really matter, you can subscribe to communities on other instances.

If you search with this format you should be able to find communities on other instances !community@instance.tld

The exclamation is important in case your instances doesn't have that communities info store on their servers yet. It'll force your instance to search for that info on the other instance.

Lemdro.id is another instance, but you can subscribe to their android community on lemmy.world if you follow that formatting

Thanks for the response.

So following the other guys response, I was able to connect to that Android community, and even subscribed, so it's in my front page now.

Why would I need to make an account on that instance? I haven't tried yet but it looks like I can respond even with my account from this instance too.

Multiple accounts would put me off really, I like to be able to look back on everything on the one account.

Also side note, but unrelated, it does seem harder to find communities, I searched Android on Connect and got relatively little. But I found this Android one by checking specifically on Reddit. Maybe that can improve some way in the future.