I wanna get into editing and creating a more personalized avatar for myself.
Can any model be used as a base and how difficult is it to make various adjustments to it?
I assume reskins are about as easy as opening the texture file and editing it, while adding clothing remains simple until I'm looking to add additional dynamic bones to it.

Any resources on that topic would be greatly appreciated, I'm already familiar with importing booths into the game and making minor tweaks within unity.