The ones that helped me in one way or another. I'll try to keep the list as short as possible.
- The Transition Channel. Concise videos made by a gender specialist.
- Zinnia Jones. She has many great videos there regarding gender. Her argumentation is very strong and is always based on a thorough research, never on rumors.
- transformering.se. Sweden-related resources on the topic. It has a well defined steps of the process in this specific country, too.
- reddit. There are several subreddits worth checking out. Just search for them.