With the character class, the collision capsule is far too large for what I want, but I cant change it due to it being inherited (and also maybe the root). I can change the size in a pawn, but getting movement working on one of those is too much for whats probably a simple fix to the character. Is there any way to edit the capsule?
Welcome! 
Yes, you can edit the size of the Character class collision capsule… “capsule half height” and “capsule radius”
If the shape doesn’t suit you… I think… you can disable this default capsule and nominate another collision in its place (I think it needs to be a primitive though)
The reason the Character class is limited to capsule/primitive collision in movement is that… I think… it uses some kind of efficient shortcut physics collision system… rather than the full usual collision system.
PS. You can add other collision to your Character… but it won’t affect movement, it can look very good though (arms, tentacles banging into walls etc.)