So! I'm 24 years old, currently female gendered and male sexed. Anyway, I set up an appointment at Callen-Lorde to do informed consent and start HRT to begin to align my gender and sex

. It's not until July because I'm out of town for this month. But I was curious, how long until the changes become clearly noticeable to a person who doesn't know necessarily that you're trans?
I ask because I'm out to my parents and a couple of my closest friends, but other than that everyone still thinks I'm a gay man. So I'm just trying to mentally prepare myself for when it's going to be clear that SOMETHING is going on in effect outing me to anyone who may not know at that point.
Also I am going to start my last semester of school in the fall and am struggling with how I should present myself. My instinct says attend school as a guy while I'm letting the hormones do their thing for five months and then go full time after graduation, but I'm not sure if that's tenable if HRT has an obvious effect before then...
-Dev