SciShow (a great science education YouTube if you don't know) made a video explaining #HRT pretty well.
The video is written by and presented by trans/enby people as well!
(I'm not trans, so I'm not fully involved in all the literature. So i can't fact check it. Usually scishow is pretty on the point though)
Also, bonus: the comment section is.... surprisingly supportive and not actually toxic which is a welcome surprise... SciShow audience are a W as usual.