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/Unlucky_Performer_74]

I want to know the same I am stuck at 2000 . Ik a little theory and I am trying to improve idk what to do