I think that posting this thread is a nice first step to improving. You need to spot your mistakes and share your hands to the forum, so that the more experienced players analyze your game, find your weaknesses and fix them. Its basically the same as playing Chess. At the end, when you lose, you go over the game again, in my case, with the local chessmaster, and he points me out where I lost the game by making a bad move. So if you analyze them you will become a better player sooner or later. You can analyze it while you play, for example you lost a hand, by making a nonsense bluff, ask yourself whether it was worth it, or not, and whether you should repeat that considering the same scenario comes again to the table. You also would want to keep track on your opponents , study their style, and mark it. Also reading cash,mtt,stt strategies online would help you a lot. Consider reading an article about pot odds
,outs if you havent already.