Congrats man! That's super exciting!
I wouldn't be surprised if it ended up being another year for T for you, because unfortunately, 16 does tend to be the youngest it gets prescribed. Sucks a lot when cisguys get their T so much earlier XD But blockers is a great step on the way there!
As for your height, I wouldn't lose hope! It's actually pretty normal for people to continue growing until 18 or even into early twenties on occasion. I'm 19 now and I've grown about an inch and a half in the year that I've been on T. You may not get to 6' but you might still have a few more inches in you!
Plus, to my knowledge, I think it's estrogen that influences stopping growth (rather than T encouraging it), so blockers may help you out too. I'm not sure if blockers will do that, but it wouldn't surprise me at all.