Hi Sarah,
Welcome to the site. Starting HRT varies from country to country and from state to state.
So first where are you?
In Australia, where I am, you have to see a therapist/psychiatrist and an endocrinologist.
In the USA you should see a therapist and then get medical referrals. My understanding is that you can buy hormones across the counter in the USA, but that is a very dangerous way to go. Wrong hormone dose, no liver; no liver, no life.
So we need some more information.
Have you read the Wiki Section? There is a lot of info there as well
Cindy