Good idea would be to imply defined ranges for each position for example open UTG AJ+, ATs+ KQ, 88+ or what ever you want but dont A2o cuz you feel like you wanna add more or something, if you wanna add or reduce your range you need to know why, its cuz there is fish behind that will call wider or there is fish on blinds on whom you gonna have position or something but that adds upp with time. also dont cold call speculative hands and do your best to have position whit hands that you cold call with, define your 3 bet range for each position and against every position. try to define in your head what are good flops for cbet what are good spots to steal blinds, that are the moves that make you insta profit...
you can chek pokerfighter.com and practice ranges and cbet spots...
You are in the right place and i can tell that you have the right mindset to improve your
poker game... Talk to ya soon, GL at the tables