If you're looking for more concrete details on what it's actually like to make things at Dynamicland, I recommend this writeup by Omar Rizwan. (from 2018, so doesn't reflect recent progress, but it's still helpful for getting a feel for the place):
I wish there was more out there about this. Seems kind of neat despite the limitations but I haven't seen much new come from it since it was introduced years ago.
https://omar.website/posts/notes-from-dynamicland-geokit/
I also wrote a short explanation of some little experiments I did there when I visited a couple years ago:
https://www.geoffreylitt.com/projects/dynamicland.html