Hi Mandi. Welcome to Susan's.
I noticed effects on anti-androgens in three days. (As always, your results may be different.) I felt "right" for the first time since puberty.
The effects of the estrogen were slower for me to feel. I don't remember exactly, but it seemed like it was about 6-8 weeks before I felt a tenderness around my breasts. The visual effects - being able to see growth - took longer.
Look around here at Susan's, Mandi. There's lots of good information and good people here.
Happy exploring.

- Kate