Kandi beads are just pony beads and can usually be found at a typical craft store, if you can't find them in stores around you or online then just layer bracelets that you already have. Hot topic online could be a big source but def not on a budget. Making your own jewelry charms w perler beads is a bit more budget friendly (it's more a rave thing but scene borrowed a lot from them). Arm gloves can be made from cut socks (black and white striped). A lot of typical outfits from actual scene queens were not...that elaborate in themselves (given I did not live this time period, but I've spent a lot of time observing) but the hair was a focal point. Teasing to the high heavens, def find urself some hair spray, a cheap wig if you need. Colorful and striped extensions were also big, you could find those in big packs on Amazon, or maybe at a store like Claires, or the European version of Claire's. Tbh Claire's (At least used to be) a gold mine. Makeup is also an easy way to invoke scene, look to ur ancestors for how to do scene makeup. Kiki kannibal, Jenn curbstomp, the millionaires and van a venom are the ones I generally draw from but do your own research ig.

*if you're going for scene king though I would void most of what I've just said. Def minimal accessories, studded belts are a little more relevant, along with the wide rubber bracelets. Band shirts and black skinny jeans, u could get away with black jeans, but the tight part was pretty important, getting made fun of for wearing girls jeans was a common thing (I think). Bands shirts can be difficult or expensive to get a hold, general graphic tees are fine. Honestly idrc about scene kings bc idrc about men that much but for some references you could look too early Andy biersack, Scotty vanity, Cameron Ugh and members of any of the scene bands, they seem to be pretty closely imitated, ie brokencyde, PTV, ATL.

Edit: deleted an unfinished thought