I recommend starting with skinny jeans, bight-colored or dull-colored t-shirts, and a few neon accesories like a couple of bracelets and bright earrings! Maybe even rings :) you could also wear fun-patterned leggings (stars, stripped, ect) with a pair of shorts on top! After all, that’s how scene and emo were back in the day; little to no accessories! Today’s scenemo are packed with accessories, they look more like decora scene/emo styles rather than just scenemo, so underdressed still counts as scene and emo, in fact it’s even more accurate to scene than the current scenecore akdkskdk
I do wanna note though, music is a big key in every subculture, is recommendable that you listen to scene or emo music if you’re in the subculture! Gets you more in the feels 0w<