I don't think that non-binary issues have a large enough platform for that to be a course for a therapist.
There is however plenty of good information that they have access to. But also some really bad, outdated info.
Just as you need a surgeon to do surgery, so you should have someone qualified to at least make an assessment of you for any surgeries and for HRT.
I don't know, I've never looked into top surgery requirements, but I assume that you will need, at the least, an assessment for that also.
*sarcasm* 'Hey Doc, can ya cut these off for me when you get a chance?', 'Hey Doc, wanna give me some hormone stuff, but not to much?'...
Therapy is one of the crucial elements of learning about yourself, plus getting some answers to your questions.
Any good gender therapist will do, unless they don't think they can handle it. I don't think you'd find many like that.
Non-binary Trans* isn't that little thing off to the side that they don't want to bother with.
Many will look forward to the opportunity to learn more about it, from you, and what information that is available.
Crucial is finding one that you feel good with.
Shop around, they will all tell you they are really good, regardless, but that doesn't necessarily mean they are for you.
You'll hear it from plenty of people that self medicating is extremely dangerous.
You need blood work done, just to find out where you are, hormone and other things.
You will need to do this every so often after you start. Pretty doubtful that a Dr will prescribe with out it.
If they do,...I wouldn't think their level of competence is very high. Just my opinion.
There are many different kinds and doses for HRT, even low dose.
You need to find what is right for you, and the right dose.
What is right for someone else may not be right for you.
Make informed decisions.
It is simply something that DIY isn't safe, regardless of how much information you find.
Unless of course, you are a Dr who specializes in this stuff.

There is a difference between full dose HRT and low dose, more than just the doseage.
If you can't find a therapist in your area, you might find one who uses Skyp.
A therapist can open doors for you to get to where you want to go, Dr's for HRT and any surgery you may want.
Ativan