We'll if people think your goth you should try to add some bright fun colours into you outfits like you could wear like one of those cool rock band tees with coloured skirts,shorts,leggings,jeans and maybe white converse also try patterned pants/shirts and shop at places like American eagle and Aeropostale and I thinks you should try muscle tees and graphic tee and crop tops will be perf for someone like you
Well if you don't want to give off a goth vibe but still like dark colors then wear purples and blues and things. You seem more artsy ish so maybe stores like urban outfitters, forever 21, or areopostale. Just wear things you like because if you like them it's expressing your style
Just buy whatever pops out at you, pick clothes that you like & that you look & feel good in ya know ? And the stores I recommend is Forever 21, Outfitmade, Shopjeen, Storeenvy, Karmaloop, Zumiez, Hot Topic, PacSun, Tilly's & Vans. That's all the stores I can think of, they all are different but wonderful check them out. :)