Thanks a lot for your answers Preggo_Basashi, chessweiqi.
kindaspongey, I'll check the books later today. Thanks!
About my account existing from 2013, yes, I did it for fun to play a game with a friend. Eventually we played a bit more, but that's it.
I used to be a fan of animes and that's why I have this username/avatar.
So, back then, I've played 12 games by just knowing the rules of how to move the pieces/pawns.
What I meant by "I've started playing chess 2-3 months ago, as a pastime", is that from late April till today I've played 36 games.
A game each 2 days, ehm, not much yes, but during this time I've actually studied the study plan.
Learnt to focus on getting center control, pins, forks, a couple of simple endgames, all the rules of chess (stalemate, threefold repetition, 50-move rule). I learnt how to keep score (chess algebraic notation) and actually played 9 games in RL with some friends, where in most I kept the score, then passed it on chess.com engine and checked my blunders.
Right now, I am getting a bit lazy and play fast without much thought, so for me the next step is to keep notes before each move and keep track of the plan before moving a piece.
I think that If I do that, I can improve faster & more importantly notice my improvement when watching not just my past games, but my past notes.
When I checked my games from 2013, I was amazed by how bad my moves were, most didn't make sense.
Imagine that I am only around 1000 elo, and I am much better by back then in 2013 when I didn't know the fundamentals.
I join the 0-899 elo streams of chessuniversity on twitch each Saturday, and I noticed that the teachers where on 2000-2200 elo, so I thought I should try to get there.
It struck me, because when someone from the chat asked him what's the best move would be here (in an example), he made a move that seemed very arbitrary to me. I immediatelly checked on the chess.com engine, and it suggested the same move. Sweet!
So, I decided to ask you guys here to get your opinion on the theme as I am pretty new to chess.
Thanks again for your concern and answers, I didn't expect so many answers.
Especially passages from Dickens. 
I could name some here, but that would get a good thread locked in no time.
You could use Russian.