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):
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: