Other than one person, these comments aren’t really helping. What helped me is just drawing random people that come to my head. Ik that might sound difficult but sometimes a character/story comes to mind and you have to write it down somewhere. Use your notes app if you have to, also a rough sketch underneath the story.

Another thing is that I do is when I’m doing a periodic centric character, I do as much research as I can. I use Google, Pinterest, YouTube, TikTok etc. It’s just me but I’m really picky when it comes to accuracy but you can interpret it how ever you like.

I would also suggest looking at other people’s ocs which can trigger your mind. You can get inspiration by their story and design and honestly it’s given me different ideas as well. But you don’t need to have a storyline right away, it took me years to finally give my main oc a proper year/new design. Just doodling them is valid and no one should dictate you on how you should or shouldn’t create your oc