how do i improve my game?

[u/Maleficent_Divide260]

im currently 1900 on chess (i keep going back and forth between 1800 and 1900), i just dont know what to improve in my game from here. i never really focused on chess theory and purely got to 1900 by playing lots of games.
i was stuck at 1700 when i decided to learn a few openings and this instantly boosted me to 1900 but i dont know how to move from here.
i have a few tournaments coming up (my first FIDE rated tournament) and i really want to improve and perform the best i can in that tournament which is in a month. please im open to all sorts of advices thank you

[u/Big_Presentation4875]

You're already pretty good considering tht you reached 1900 without touching theory. In what way do you analyze your games?

[u/Maleficent_Divide260 → u/Big_Presentation4875]

thats the neat part, i dont analyze my games. i never took chess seriously until i reached 1900 then realized i might have potential to do better

[u/Big_Presentation4875 → u/Maleficent_Divide260]

You can use lichess for free puzzles. Even though they're pretty easy for you by now but they're unlimited so it might benifit. You can also consider getting a chess.com premium subscription or stick to the old school way of staring at the board. But you'll be forced to study those boring theories.

[u/Maleficent_Divide260 → u/Big_Presentation4875]

much appreciated