If you don't mind me asking, where do you live?
I started on oral tablets, it was an incredibly low dose, and that was slowly upped over three months before I even saw my first needle. And then, once again, they started that on an incredibly low dose. Because I was transitioning to male, and I was on such a low dose at first (damn you tablets!), they also put me through menopause so I wouldn't menstruate. Seeing as though the low doses of testosterone were then the only hormones floating about, I was still surprised to see that things were so slow.
I'm fairly sure the only reason they did this, is because Australia is still fairly new at the whole HRT thing, so they like to be incredibly careful about it. I was 16 when I started, so they probably could have just given me half an adult dose to start with.