We chatter on this Discord server:
https://discord.gg/9hCUD4n7R2
Aimed for beginners, this video shows you how to import and animate Mixamo characters in Unity3D.
Assumption: You have installed Unity!
New: I've added ads, because it seems if I don't, my videos never turn up in searches.
Unity can be found here: https://unity.com/
Mixamo here: https://www.mixamo.com/