Yeah, there's a surprising amount of changes that can come with hrt! Hormones have a really big impact on biological sex, much more than chromosomes.

It really sucks that you're not in a supportive environment :( Maybe you can get away with growing your hair out and doing some voice training while you're still living at home. And you can probably find skinny jeans and pink t-shirts or hoodies in the men's section, could be a way to get some more fem clothes without looking too sus.

Also maybe look into finasteride. It's something cis men take all the time, so your doctor should be able to give you a prescription. It's not hrt, but it will remove any risk of balding, and can potentially reverse balding if it's already happened. There's also a very low chance of it having some feminizing effects, apparently.