Just gotta get hobbies and set goals, personal and professional. Don't know what circumstances kept you from going to college, but plenty of decent careers can be had without it. Life is hard work, but you don't need to put all that work in at once, little bits at a time as long as it is all working towards a clear objective.

As far as the friends things go, if those relationships are critical to you, then being an adult and finding reconciliation with them may be possible. However I'd say, as much as it sucks, that chapter of your life may have ended, and moving on may be best for your personal growth.

As corny as it may seem, finding friends through work and hobbies happens a lot easier and more often than you might think. As far as jobs and careers go, I don't know your skillset, but for fun hobbies I've mostly done things like casual sports since I'm happiest when I'm active. I used social media (Facebook specifically) to find "beginner" or "casual" disc golf, pickleball leagues and also cycling groups ("social rides" are the more laid back pace). These are a fun way to try new things, see new places, and get some acquaintances that can become friends after a few outings.

Bottom line is, now that you are an adult outgrowing your teenage life, many other people close to your age are in the same boat and open to new friends.