what's my best option for getting on E? (14mtf)

after coming out to my parents i talked to them about medical transition and they're both against against HRT which will likely never change. my mom's willing to let me start blockers and my dad probably will? i'm already in a waitlist for a nearby gender clinic so i probably can't just diy since it'd show up in blood tests. i also can't just suddenly say i don't want to go to the clinic because that'd be super out of character. is my best option to just hope my dad doesn't let me start blockers? am i just doomed otherwise?