how to pick out an outfit and not overthink it?

I'm a 15 year old person who really likes fashion I am a guy. I can dress others really well but when It comes to me I end up over thinking my outfits and stress about it. I sometimes end up wearing something I think is to simple. sometimes Im able to pick out great outfits for my self but other times I cant. I don't like wearing the exact same outfit twice so I run into a problem when coming up with outfits. what's a better way to think of outfits for myself. I can't always dress in layers because I'm still a highschool student that does p.e so I still have to dress out. I would really apritiate it if someone could give me some advice. I already look online for new ideas and mix and match stuff but I still struggle at times. I like dressing in more higher end stuff and more unique stuff you don't see a highschool student wearing. I would just like a way that I could pick out an outfit for my self without over thinking it and having a difficulty with it