How do I become Original?

I have always wanted to be an artist. Always. I can draw cartoons but I feel that doesn’t really count. I want to sell canvases with cool stuff on them. But for the life of me I cant come up with something original to paint. I know the old adage is to steal like an artist. But I hate the concept. In the past I have painted popular cartoons onto canvases, Bugs Bunny and the like, but it just doesn’t feel right. I tried to do some “Wheres Wally” type cartoons but I copied that off Mitch Revs. Now, I’m thinking of doing stencils of famous figures onto canvases like the artist Johnny Romeo. With a few made up quotes around them. More unoriginality. For the love of gypsies can I please get some original thinking please?