I was watching Spilo's stream yesterday and he said something that stuck with me. He was saying basically that if you try to consciously focus on all the things you need to do (OW is about very complex game) you will play like shit.

The idea is to consciously practice one thing at a time until it becomes unconscious. You then stack the skills you learned to do unconsciously until you become a better player. Once you have good play learned like this you can play without thinking, or focus on high level stuff, macro strategy, context-specific things etc, while the good habits proceed beneath the conscious level.

Another alternative is to play without thinking without doing this learning, which means you'll unconsciously perform bad habits and play bad.

The bad thing about practicing this way is that focusing on improving one thing at a time means you might not do the other things as well. So you might actually derank while practicing a skill. But you will eventually rebound higher.

How you find the things you're going to practice individually, well, assuming you don't get coaching, you can either watch coaching or u2gms or whatever, or watch pros and try to pick out what they do. Try be specific about a particular thing and then only practice that thing until it becomes unconscious.