Oh, original characters get easier
I think it took me a few years of practice, but they got easier... then when I was plotting Hearts Divided, it occurred to me that I'd need at least four OCs (with recurring involvement in the story, no less!) and panicked
But as the story evolved, they did too, and I had a lot of fun with them
Though of course, you want to avoid making the OC the *main* character...
PJ