For my common app essay, I talked about how I liked to draw and that influenced me through my life. But, I don’t think I exactly excel at drawing so I never uploaded them as it is not something I devote an immense time to. I’m just worried if Princeton would question this inconsistency…and possibly reject me?
Stop worrying about trivial things — no, they won’t “question this inconsistency.” Just chill out and keep your fingers crossed for March 30 
Relax. You are allowed to have an interest. Anything can be a massive influence in your life. You don’t have to be a master of those things. Princeton will not penalize you for this at all. Just be you and proud of yourself for what you have done and are doing. And good luck!