My name is zee and been wanting to use ze/zir also but sense nobody can reliably just use she/her for me. Not even they/them I just kinda gave up. If they don't want to use my pronouns then I start just distancing myself from them.
Also regardless, they them is for anybody you don't know the gender of and when someone uses they/them I don't mind because there's absolutely no way for them to know unless I tell them.
Unless I put it in my username or something like that, but even that people don't read.