Backstory?

This isn't a chapter, but I wanted to ask y'all something

I want to expand on James' backstory but so far I don't know where to put a backstory chapter

SoI want to know if I should do a Hidden Inventory sort of chapter where I go through James' backstory in a flashback

Comment here for a chapter or two explain his backstory

Comment here for naturally putting it in the story

I really like asking y'all this since this is my first serious fanfic and I want to make sure it's the best it can be before improving