What do you need to improve? I can tell you that if you want to improve in the game, create a routine to improve your aim, play a lot of DM, watch tournaments and demos, see how the professionals play and how they handle the angles when playing or opening An angle to find a low. Try to learn the cans of all the competitive maps out there and start to get together with a group of friends who have the same thought as you when it comes to playing .. "of wanting to improve and play tryhard" play every match seriously, be it a mm or a lobby with friends, find a team and start putting
A routine can be 500 assault kills (250 ak-47, 250 m4a4) 150 kills of pistols (100 usp, 50 deagle)
After the routine, look at tournaments demos, try to find your role within a team, how you like to play, if entryfragger, lurker, awper etc and look at the ones you like, I leave you a page so you can download them demos HLTV.org
I hope it helps you and learn the cans !! every day enter a custom and practice the smokes.