Just start watching hockey. Best way to learn it. And of course sometimes watch with a fan so you can ask why. Definitely go to live games - at colleges, kids at the rink. It’s all fun. In my opinion, the most exciting team sport there could be. And even though there is fighting, the kind of takedowns of good players resulting in injury is despised. (Was surprised to see UCLA football players high fiving over tag teaming a head injury on Stanford Saturday)
I started watching when my son played and when we lived across the street from an old IHL team. From that point on, hockey found me. It’s addicting.