I live in the United States and I have found there are various ways to get on estrogen. You may be able to simply go to your family doctor or a doctor to get on HRT. I think it's best to focus on going to an endocrinologist, someone who is familiar with and understands hormones. But also this is your body and I believe in taking personal responsibility (when practical) and learning about hormones, know the side-effects, familiarize yourself with common medications and dosages. Doctor's don't always get it right.
In the past I simply ordered hormones from online. I also saw a psychologist for hormones which I found to be a waste of $ and time (in my own personal case). I also have simply gone into walk-in clinics and acquired hormones that way (in a matter of hours).
Everyone has an opinion, but there are many ways to get on hormones. A psychologist won't typically prescribe hormones but will rather refer you to an endocrinologist after he or she has sold you a certain amount of therapy or determined if you are a viable candidate for hormone therapy.
If you plan to transition and to take this all the way I would recommend looking up the doctor in California who does hormone implants as the results I have seen were pretty amazing and cannot be duplicated later after already having started hormones with other means. At least according to someone I kinda knew who had the implants done. Her result was outstanding areola and nipple development.
Most endocrinologists prefer to protect their practice rather than to give you results. On the other hand hormones used improperly can be dangerous, one could have a blood clot and loose a limb or die or worse, maybe a blood clot in the brain. There are different risks associated with different types of estrogen. Currently I am on a very powerful and potentially dangerous estrogen because only small amounts are required making it cost effective.