You're only a year older than me when I started. I had major self confidence issues when I started. What helped me was friends, support groups, my therapist and voice coach.
This is a great first step, coming here and starting to talk and feel things out.
Everyone's milage varies but at your age you stand a good chance of HRT working pretty good. To give you an idea this
and this
where taken less than a year apart and during my first year of HRT.
