Cosplay is a lot of fun and the Lolita / Brolita style has a lot of fun options and you can get really cutesy (standard Lolita), dark (gothic Lolita which has some amazing dresses), or even branch off a bit to harajuku (which I think you’d really like based off of what you like).
Normally my wife is the one who cosplays and I am just there for support, carrying things, and doing emergency repairs. Generally dressed as generic thug 1.
Since coming out to her, she has been writing out ideas for couples cosplays. Normally I am the one building and sewing the things for her to wear, so a couples cosplay / cross-play will be a new experience for me. I’ll have no pockets! Conventions are a pretty safe place for expressing yourself and trying different costumes though.
Brandie Knox has posted her great Supergirl cosplay in her photos too. If you haven’t seen it yet you should.