Choosing a grand master to study


Don't chose just one, maybe 2 or 3.Magnus, Fischer, maybe kasparov. (Sorry for my English, its not my native language)
@1
Instead of chosing a player, it is better to chose a tournament.
Selected games of a player are not representative of usual play.
A tournament contains all kinds of situations.
That is why Zürich 1953 by Bronstein is such a great book.
It contains 210 games with superb explanantions by the runner-up.
Read, study, understand and apply 3 or 4 chess strategy textbooks first. Some have exercises. At that moment, you won't understand the GM annotated classic games. Studying GM classic games is for advanced players.

It's just a mistake to try to improve by studying the greatest players/games in chess (or studying chess openings/using comp analysis, for that matter) when you are a beginner. It's like watching videos of NBA players to improve in basketball when you can't even dribble with both hands yet. Not trying to be disrespectful at all, you just need to keep your progression goals relevant to where you are in your game. Watch beginner-to-intermediate videos to reinforce the fundamentals and learn tactics, and then when you do play take a few minutes after each of your games to self-analyze for 2-3 things that you can take with you for the next game. Enjoy your ratings achievements and set reasonable goals there as well. Best wishes!