There's quite a bit of process content on Reddit actually! A couple more TG subreddits are:
https://www.reddit.com/r/gendertransformation
and
https://www.reddit.com/r/genderotica/ (which has been inundated with captions the last couple weeks, so if that's not your thing you'll have to dig a bit).
That second subreddit also has links on the sidebar to other related pages!