sexuality has nothing to do with whether youre trans or not. theres trans fems of every sexuality. im mostly a lesbian for example, which is a pretty common sexuality for us. people usually recommend the gender dysphoria bible for people who are questioning. it can be really helpful to explore to better understand yourself. one pretty big piece of evidence you can hold onto is most cis people never even think about being another gender, let alone consider whether they want to transition.

im sorry youre surrounded by mormons :/ it might make it pretty hard to transition if you decide its for you. since youre still young you might think about going to school out of state or in a large city just to have some space to work it out. it would also make it much easier to get hormones if you get on the school health insurance plan (if it has one).

im autistic too. some people think pretty much all trans people are, but thats a matter of some debate since tons of autistic people dont even know theyre autistic. regardless being autistic increases the likelihood of someone being trans in general.

in the end you could just try hormones and see how you feel about it. theres always a process to getting them, but seeing how you feel when youre on them can be a huge help figuring yourself out and accepting who you are. you can always stop. it takes months for permanent changes to really get going so youd have plenty of time to figure it out. being around mormons i assume youre in the usa, so probably the easiest and fastest way to get hormones is to go to planned parenthood. they use an informed consent model for gender affirming care, which basically means they wont try to gatekeep getting hormones behind psych evals and other bullshit. when i went i got prescribed and picked up my hormones the same day.

hope this helps. good luck on your gender exploration!