Thanks for the quick reply. I'll see if anyone else has some data on the matter and then check in with that link.
All in all, I might just stick with the character and hope they give us, at some point, at least one chance to redo their look. I couldn't get the mouth sliders to work at all in between crashes, so I just went with what I had.
Update: I actually used the link you posted and found this link through that one: https://support.rockstargames.com/articles/360017439794/Deleting-Characters-in-Red-Dead-Online
If anyone is considering starting over, you lose everything you've done/spent. Something to consider before deleting a character.