I struggle with book choosing anxiety as well! I've recently started using Libby (through my library) as an online reader, and I've found that having a 21-day loan period and a set number (I think 10 or 15) books I can check out at once has helped me to feel less overwhelmed with selecting books. I tend to pick 3-5 books at a time, and only "check out" new books once I'm done with those.

In terms of choosing books in general though, it's always a hard one. There are SO many good books out there, and never enough time! But it's helped me a bit to prioritize whatever book excites me most in that very moment, and accepting that it's okay to leave the others for another time, or never read them if other books catch my eye more.