you can get inspiration from other shows, too! but, don't copy everything from it. it's gonna be more of a rip-off.

one more important thing:
the character/s has to be relateable! having them being a mary sue/gary stu won't be as interesting at all. *mary sue(female)/gary stu(male) means a character who lacks any flaws and can't be that relateable, and they're unrealistic*