So, first I'll talk about the art.
Great art, even though it's not yours, but you did admit it wasn't yours.
And now I'll talk about the protogen.
You should follow what you want to do with it. I haven't made a proto oc, but I can give you advice. Do you like this art? Don't try to replicate it. Strive to make it yours. If you don't like this art? Again, you should do what you like with this.
I know the struggle with not having an idea to make art, or anything. I am a soon-to-be famous bookwriter. In fact, I've finished one of my book, but that was 1 year.. for 68 pages. I experience major writer's block, and as a game dev, that gets even worse. You run out of ideas for games, and you start plagairizing (am I saying it right) to update it. My advice is to start with an idea, like this art, and then don't replicate it, but make it your own. Thank you.