Why I cannot play my own game well?
Clicked post before finishing the question. What do i need to focus on? Lessons? Practice? Though common sense would suggest both, I think something might help more than the other.
Masters understand all aspects of the game to a high degree. Tactics, Positional, Openings, Endgames. You might be able to guess some of their moves as they know how to get into good positions where you may not know how to get there but maybe see an obvious good move from a good position. At your level how you should get better? Play slow games and analyze them after to see what you done wrong or could of done better. Also tactics training . Those should be your main focus until at least 1400 - maybe even much higher.
without proper basic, books and chess engine, it's impossible to play like gm. play your own style that u think effective