I’ll always repeat this to everyone as my go to.
For starters don’t count yourself out. If it says college degree or cert required and you don’t have it, apply anyways. I ignore them every time and 99% of the time I get an interview.
For resumes/CVs make sure to copy and paste some of the language they use in the job description or post. Try to blend it into things you have done or the hobbies you do.
Don’t forget to also use references that are actually pertinent to the job. Your previous boss is a good one, but so are people who work in that field that can vouch for you. Don’t be afraid to actually ask people you know and name drop where you can.
Interviewing is a skill. Take notes, take time to answer questions, drink some water. Acknowledge interviewers and their questions and always try to stay on track of their question. Sometimes I have stories for my answers and at the end I like to bring it back by repeating the question and then explaining how that story answered it.
Lastly be reliable and helpful at your job. People don’t care if you don’t answer work calls or texts after hours, but they do care if you take initiative to help and ask occasionally if there’s something you can do to help. Don’t over work yourself, and remember to shit on company time, but do try to make an impact on key people so you can keep crawling up this shitty capitalist ladder.
Also, checkout Etsy for some good Google doc templates. I paid like 99 cents for a great resume and CV template that looks way better than I could have done in a few hours. I keep my resume, reference letters, any important job docs, and a spreadsheet of references in a Google drive folder (OneDrive, Dropbox, other cloud services work too obviously).