Congrats!
Calmness is what i noticed first. The rest comes with time, but YMMV, so don't take everything that others say as exactly what and when it will happen.
I started spiro 3 days before estrogen, my first week was a bit tiring but nothing major. That went away quickly though.
Breasts/nipples became sensitive after about a week (do not bump into things or let pets jump on you... As string or foul language will follow for sure)
Other changes noted: skin smoother, sweat dont stink like it used to, some face changes(nothing major, but i notice it when looking in the mirror), body hair seems to be growing much slower exept for under my arms...
Breasts are quite noticable to me, when looking down, but i am built rather large, so its not that obvious to others,,, except when wearing a tight light colored top...
Buckel up and enjoy the ride