tulpa ttrpg help

hi all!! long time lurker first[?] time poster :] im working on a personal project right now, and i need some help figuring it out.

i had the idea for a "solo" ttrpg you can play to help make a tulpa, and im having trouble with the character creation segment so far. im not sure what would be the best method, as there aren't really traditional stats or inventory or anything like in an adventuring style ttrpg [which i have a slight amount of knowledge on, but understand is what most are familiar with]. are there any nerds here who can possibly help?

thank you so much!!