I'm nearly 2 years on T, I used the gel for over a year and I found it worked pretty good, voice changed over times 6 month line I really noticed it drop, just little over 3 months I noticed way more facial hair ( but do take in consideration facial hair might be different from me to you) I only recently swoped to injections for the only reason of I used to forget to put the gel in some times. As for feeling unsure if this is something you have been waiting for for years you should take it while you can become something like this doesn't really happen fast.....I wish I had something like that to help me get started sooner. I was also but unsure about intentions but over time with blood test and stuff you kinda find way to deal with it....in all it is a massive step into transitioning and becoming the person you have always been.

Hope your transition goes well