Hey Taedin!
Good to see everything works when following the guides
For PCs in a normal campaign it will not be possible, sadly. PCs get a custom icon assigned according to their appearance after character creation and this gets stored in your save for that character.
The only way to get custom icons on the PCs is to skip character creation. This would require some editing and scripting as you'd have to make your PCs in the editor and add some script calls to skip character creation. (I am looking into making the process of skipping character creation simpler though.) But even then, this would apply to a new game only, not an already running campaign.
Sincerely,
Kevin