I will be using the rules etc found on the Birthright Wiki. but will summaries the tables here.
Regent character creation will be as follows:
Standard level 5 D20 characters as per D20 SRD. Please note that your PC’s may not see much action themselves (other than what adventures you put them through) so good skills will matter more than anything.
Next to no limitation on Race (modifiers may apply) and Class. If it does not exist in the D20 SRD then we can discuss your idea.
Choose your starting Province anywhere on the map that has been named. For the Domain you will be ruling can you outline any ideas you have so I can see what rules may need to be made to fit.