hi! chiming in a native french-speaker nonbinary girl! i'm afab, i've always been a girl and i love being a girl, but i thought nonbinaryness was awesome and i wished i was nonbinary, and one day i realised hey that's what nonbinary means, i don't have to be one or the other of anything. i can be both. i'm nonbinary, i'm a nongendered blob and i'm a girl. it's great. i realise it probably feels different if being a girl was something you have to fight for in the first place, so it might not work for you as it did for me, but still, just throwing that out, it's an option, you could try it out.
and one of the things that helped me with that was, yeah, this experience. my native language is one of the ones that does gender absolutely everything. the table is a girl. my armchair is a boy. but only in my language -- i know that in German the table is a guy, and in Hebrew the genders of cutlery are swapped around compared to the French ones. gender is made up! grammatical gender doesn't have shit to do with biology or even societal role actually! in German and Dutch the girl is neutral gender!