Huh, I didn’t know that hrt would change your “brain feel” that much. Is it like one of those thing where if you take low dose for like a week you can notice the difference?

yeah absolutely. i've taken finasteride for like 9 months (link) and the net effect of it is that it basically blocks the effects that testosterone has on your body, to a certain extent.

the biggest changes that i could actually immediately observe within a few hours were mood changes. i felt like i could think and perceive the world around me in ways that i couldn't do before. especially, it has improved my mood by a lot (well, it started with a whole lot of crying and reflecting on past life experiences in general, but after that i felt really good in a sustainable way and still do). that's actually been the first and most impressive effect for me, and sets on about T+2 hours after taking the pill (T=0), i'd say, and lasts till about T+6 hours roughly.

other effects i could observe are better smell (my skin smells better, not my nose works better) (about 3 days to 2 weeks after starting) and softer skin (2 - 4 weeks i'd say). i did get mild chest growth but it was very mild (i might have AA or A cup now)