Becoming a chess master

For that you should at least learn to use the time which is used in a FIDE rated game (up to 6 hours for the whole game or three minutes for each move) and i think it is also very useful to look at a real board and move the pieces. Some players have problems to switch from 2D to 3D. Writing down the moves, pressing the clock, etc. is also a thing, which even most ELO 1000 players do more or less automatically. Then the athmosphere in a typical open tournament with many people in one room. 

Playing with a dgt board or (unrated) otb blitz or speed tournaments could maybe solve some of the issues. But i doubt that a pure online player could bring all his horse power to the chess board in his first otb tournament.

If you aren't a talented player then go become a doctor and not a chess player.  You'll make more money.

If you are talented failing to become a WCC contender or at least a GM is an insult to your work ethic.