Online Voice Resources

Are there any actually good, education-grade voice training resources out there on the internet for mtf? I've poked around on youtube and found woefully little with respect to actually helpful, technically supported, demonstrative content. Just a lot of people poorly explaining their own experiences.

What's a transwoman gotta do to find classroom level resources? Traveling to a therapist isn't the best option for me right now, so something of professional quality would be amazing.