So what about a doujin? (Patreon)

I am really considering doing a doujin, If I do it will be very self indulgent or i will quit midway trought it, but im a bit lost anyway, what i know:

- Bakugou Bottoms

Thats it. Thats what I know.

I definetly could use some guidance on where to start, so... for the setting: