Just take it slowly !
Don’t rush yourself into buying clothes, do lots of studying (aka looking at cute pictures and deciding what you like about them - pretty fun if you ask me ♪) and then you’ll discover what parts of fairy kei you love and want to incorporate into your own personal style !
For example, with me it was puffy skirts and oversized tops !
Once you find what you want to wear, you’ll start spotting things that would work in coords all over the place, but make sure it’ll work with more than 2 coords or else you might never wear it again ;;;
With accessories, just go with what you love and what fits your colour scheme ! ♥
I hope that helps c: