Like others have mentioned, the first thing you should do is turn your deadzones down. Secondly, and I know this sounds counterintuitive, try turning your sensitivity up. I realize that seems like it will make things worse but it genuinely did help me. I had trouble aiming when I first started too and instead of turning it down I cranked it way higher and there’s been about a 10% average increase in my accuracy per game. I can’t say this will work for everyone and it took a few games to get a feel for it, but might be worth a shot.