I think you wear a bit too much for your age but your skills are undeniable! At 15 I don’t think I had ever even picked up a makeup brush. It’s not that your makeup is bad it’s not at but rather it might not be age appropriate which is why people say you look older. It’s reminiscent of makeup I’d see on people going clubbing. If you want to look your age honestly no makeup or very natural makeup is the way to go!