How to hide changes at 19 when living with very transphobic parents
So I posted very recently about having to wait 4 more years before starting HRT because of very unsupportive parents. I'm currently 19, and won't be able to wait 4 years, I'm certain of that. Puberty was sort of kind on me but I don't want to push my luck too far and just the idea of masculinizing during the next 4 years makes me want to end myself. People on my previous post told me I can get access to HRT on my own and I already have my answers so this post is not about that.
I think I'm going to start in a few weeks, but as I've explained in my previous post, parents are very transphobic and anti-lgbt. I've came out 2 times to them and I've been put through therapy to try to fix my feelings and stop being trans when I was a teenage but it didn't work. However I had to convince them that it did as I overheard my my dad saying he won't have a *slur for homosexual* in his home. Ever since I've come out they are very vigilant about me not showing any signs of femininity. I am not allowed to grow my hair or wear anything remotely feminine in their presence. I'm currently in college and I have some money from work during summer but I can't live by myself so I will have to live with them for a couple of years at least.
Before informing myself on the topic I thought HRT only prevented further masculinization. I had no idea it could feminize you even after puberty. I have a pretty androgynous physique right now and I take care of myself a lot but I'm starting to be terrified at the prospect of my parents finding out something if they see me change. I don't really know what to expect from HRT, but any tips to hide the potential changes while I live with them would be welcomed ? Thank you.
EDIT : I don't understand why people are downvoting my post... Maybe it's not the right sub for this question but I do feel that it is given the name and description of the sub. What is wrong with asking for tips ? Maybe it's because I haven't transitioned yet, but I have to start somewhere ??