Seems like I went down a similar path. Emacs user, brltty, digital display, the shebang, but not necessarily together :-)

Maybe my experience will be useful to you. Do it for the plasticity.

a high level writeup is here: https://github.com/whacked/cow/blob/main/learning%20braille....

can talk separately in more detail, although for my purposes the code parts are pretty minimal. Brltty does a good job, and so did eBay for me when I started.