I'm afab and genderless, but I still identify with terminology for women, because it's what I've known for my whole life, can I still call myself genderless even if I frequently misgender myself? Also, I deal with a lot of "toxic masculinity" because since I'm afab I get super dysphoric when I don't wear my binder or wear something even a tiny bit feminine because it makes me feel like I'm faking being genderless?
Of course, it’s fine to use she/her pronouns, terms like “girlfriend”, etc if that makes you comfortable. It’s also completely fine to present as feminine regardless of how you identify. Clothing and makeup are inherently gender neutral; it’s culture that gives these things certain meanings.