I want to learn genetics 101 so I can digest papers on human movement, particularly of Indo-Europeans groups. Where do I start?

Instead of relying on what others are reporting about a paper, I’d appreciate if people shared any books or relevant resources which explain genetics as they’d do in undergrad (I don’t mind textbooks, they’re definitely welcome!) so I can pick up the tools to decipher research myself.

TLDR; I’d like resources for understanding how genetics is used to study human movement