Hi!
Hopefully I can help you a bit with this:
Firstly, the terms UUID and GUID are generally used in the engine to refer to the same thing, as you said.
Secondly, when saying 'template', that wiki page refers to the character itself, not the root template.

Thirdly, assuming you filled in these things correctly:
Are you adding this character to the main Origins game? If so, there are some databases you'll need to set - DB_Origins, DB_OriginNPCAlignment (for the alignment which your character will have when they're not in the party) and DB_OriginInPartyDialog (for the dialogue which the character will have when in the party).

If that doesn't help, let me know!