I joined CP for about 2 years ago (more than 16 months ago, I had another account with cringe nickname and I didn't want to wait a lot to change, so sorry codeforces, I don't use it anymore, but whatever), in old account I managed to reach 1400 in 3.5 months and get 1600 from 1400 in 2 more months. However, after that my progress got stuck and since that my rating changed very and very slow (the only notable change was quick reaching 1880 and getting back to 1600 as fast as reaching it).

I joined a free online course (from Yandex), where I learned a lot of algos, but not the ways on how to use it. I tried to be the best at the courses, solving as many problems and spending as much time as I can; I solved a lot of problems here, but when I faced real problems, like in CF or at nationwide olympiads/contests, I had really no clue what to do. I was so upset so I quitted the course at a middle of the path and a little bit later I quitted CP at all. The only successful contest for me was one where a problem related at the same topic I learned when reading Div3 editoral half-year before the contest.

Now I want to try again becoming CM, but I don't know how to solve the problems and come up with ideas here. I know just I'm bad at coming up with the ideas and thinking at all, but I don't know how to fix it and become better. I believe I can't become better by my own as I always feel myself tired, alone and depressed.

So basically I have a great desire, but no resources to make it real. I used to have really a lot of time and I tried to study and practice CP all that time, but the time was spent very inefficiently. What can I actually do here now?