well, the obvious solution is to inform people upfront and not wait for them to ask you questions - I see that you did this by stating "Teen Idle I am not a he or a she.".

Hopefully your correspondents on this site will heed the warning and ask you questions.
My signature says that I am a female who is 42 years old. Even then, somebody once called me "Mister Hamster", which was funny (and no, I did not correct the person, because my gender was irrelevant to the nature of his post on relationships and communication, so it did not matter whether he got my gender right).

What you are, essentially, saying is that people should by default ask you for your preferred pronouns. I think this is not the way to go - it would create way too much work for a long list of people.

Using project management lingo: If a problem can be solved "upstream" rather than "downstream", then it should be solved "upstream".

Using plain English: nip the problem in the bud by putting how you want to be referred out in public view (which you did).

I hope that now that you have become pro-active about your preferred pronouns, people won't bother you with their assumptions.

Just to complete this exercise, you should, probably, state, preemptively, that your preferred pronouns are "theirs", etc. From your current status, it is clear that you do not like "he" or "she", but not clear that you like "they".