First of all: Don't see WCAG as a checklist of annoyances. Think of it as design constraints needed for better work. And for creativity to flourish, constraints are needed. Good accessibility forces cleaner layouts, smarter typography, and intuitive flows, skills that make you a better designer overall.
If you're ready to deep-dive into WCAG, here's all you need:
WCAG 2.2 Guidelines
WCAG 2.2 Quick Reference / checklist.
These are the official W3C guidelines and checklist, every success criterion organized by POUR, with levels A/AA/AAA clearly marked. It's a bit of work to read through, but everything you need is there.