How to move up to the next level

I'm play defense. I'm pretty good but I want to get better. I know I can. I feel like I've hit a wall. How do I level up and get even better. I'm not asking for beginner tips, I already do wayball and footwork but I just don't know how to go up. Anyang all tips are appreciated. If I had to narrow it down I guess I could say I can gaurd someone but I'm bad at taking the ball away without getting beat. I won't let them to the goal but eventually me sitting there and guarding someone there eventually going to beat me. But I don't know how much of a need that is especially since the higher you go the offense passes more often. But it certainly wouldn't hurt to have some ball strip abilities in my toolbox. If you can tell I feel lost and I just need any help you can offer. Thanks