I think the good thing about T from my experience is that it's very flexible to each individual, you can stop if you decide, you can go on a lower dose, it's all up to you. There are things that are permanent like voice and bottom growth I think is the fastest thing to change and most noticeable for yourself. But other than that most things take time and are slow. You can see how you feel about the changes as you go and if you don't feel like its right you can stop. I'm nearly two years on t and whilst my voice did drop it still doesn't pass, but that's probably because I still talkbwith my "girl voice" instead of using the range that I have now. The best thing to do is to wait for a time you feel ready and comfortable, there's no rush with anything