Hi
@Artem Polovin, and welcome to Android Forums and the US!
Your question is hard to answer. I did have a college education, but in a completely unrelated field (medicine). I taught myself programming and UNIX system administration. I had mentors, but not in the way you're describing. They were there for me if I was really stuck on something, or just to talk shop.
My employers didn't care that I didn't have an IT-related college education; it was my knowledge, and ability to do the job that they cared about. But that was in the late 1980s. I don't know if that would fly now.
I think the best thing to start with is looking at employment sites, searching for jobs in your area of expertise. See if they require a college education (and I'm pretty sure they will), and specifically if it has to be related to your field (I think so there, too).
You may be able to find jobs at small companies whose requirements may be less strict. But big tech companies? I don't think so.
We need input from people whose knowledge about this is more current than mine.