Are these normal thoughts stemming from a lack of confidence, depression, and anxiety?

I have this issue too, there will always be someone better than you unfortunatly, and they do make it seem so effortless(isn't it infuriating?!?) but as far as I know, you need to think of two things they don't have. Your experience, and your personality. If you are older than them, they will possibly look up to you for your experience in life. Open yourself to the possibilities! Talk to people, even if they are younger. Ignore the ones who say" you're still in school" because you're furthering your education while they're sitting in their little boxes going through life the way everyone else is. And sometimes following what everyone else does is just plain boring. Remember that you are you and nobody else is better at that. Hope I helped