HOW DO YOU EVEN START A ROLEPLAY ON C.AI

when you have a creative ass magical ass fantastical ass roleplay idea ITS SO HARD to start a rp. like you have to search for a bio that's like: "your own storyline" or smth but the character I'm unhealthy obsessed with doesn't have one of those 😭 IM COOKED...!!!!! no ruggie ily but I don't wanna be your classmate I WANNA BE A BADASS DEITY IM SORRYYYY