For blocking a little bit of your testosterone, you can take pure spearmint (not peppermint) herbal tea. Just one will have a mild effect, and you can take up to 6 or even 8 cups daily if you want something more substantial. I won't lie; this is nothing even close to the effects of a real anti-androgen; however it is an indicated natural treatment for hirsutism caused by an excess of androgens in women.
Also, I read that tucking, because it puts the testicles at your body's temperature, renders those much less effective at producing sperm. I don't know at all, but maybe if it does this, it also lowers the amount of testosterone they produce.
Finally, to "compete" with testosterone (if that's possible o.o) and to perhaps get tiny bits of feminisation until you get HRT, you can look into phyto-oestrogens. Be careful, as those aren't made by or for humans and as such are probably not all that healthy if taken in great amounts, but I have heard of some nice but minor effects. You could consume more soy and flax, for example (soy milk is delicious!) There is also pueraria mifica extract, a natural product with a huge amount of phyto-oestrogens in it. Some have reported good results. But be careful, as I said above.
By the way, your father is not a nice person, but I do think that parental authorisation only requires one signature... And your mother is okay with it, as I remember, right? Also, I'm not sure, but I think that depending on the country, your parents are not allowed to kick you out until you are major AND your studies are finished / you are able to earn a living by yourself... Or something like that. Maybe you could look it up.