For your room, try looking for some dark humor posters, mix it with some art posters you like, and your good for your wall. If you want, you can add a tapestry that you find appealing. For kidcore, maybe put some trinkets or fidget toys on a shelf or your nightstand?

As for your clothes and lifestyle, I think you might be a neon person, but I think blacks and greys suit you also, idk. You can wear shirts over long sleeves, and mom jeans, most of the stuff people wear in the aesthetic business. I also think you might be a night person, just a random opinion. Anyways, these are just ideas you can change to shape your personality more.

( ps. I think you’re a e-person/bastardcore, and a bit of soft-person/art hoe)