How do I get rid of this? I tried doing a loop cut, I tried removing every other edge inside, so I get 4 corners instead of 3 - it only seems to make it worse. Any tips for a beginner?
Quick answer: you need to inset a little more and be sure that the last inset is planar to the center of your mesh.
Long answer: you need to fix your topology --> You can check here for more info on this problem: How to avoid the wrinkle at the poles of the UV sphere?