It's 30 minutes every couple of weeks hassle rather than having them as part of your pills regime but there is some level of pain involved (although we MTFs still have to take blocker pills unless your getting injectable spiro aswell) You will have to get a nurse or something to stab you the first couple of times until your taught howto inject yourself properly.
It's less thrombic risk which is why I requested it.
I recommend the bum instead of the thigh it hurts less in the long run relax it will hurt a ->-bleeped-<-ton if you tense the muscle. err there are some slight symptoms at the start and end indicating irregular hormone levels. too high and too low respectively.
Oh and your nipples will hurt alot shortly. Congrats and enjoy your stay in puberty.