Hey @ElSopero!
So you can’t alter inherited components from a C++ class without editing it in C++ and believe me, unless you’re an expert in it you do NOT want to open “Character” and mess around with a few thousand lines of code. (If you are, by all means go for it!)
Generally you don’t want physics enabled on a character as it will ragdoll. Ragdolls are just regular characters that have had physics turned on on their meshes- their collider is still in its original place.
If you want your player to have a horizontal position, I highly suggest using the “Pawn” class-
Character is pretty much locked to bipedal humanoids, and pawn is MUCH more customizable. 
Hope that helps!