The maps look nice. I'm working my way through that thread.
I have done a little work with maps -- little and in a very limited way. Either getting a vector map & adding info; or occasionally using a scanned map, adding info; even drawing maps from scratch (i.e. "tracing" to create vector image - very time-consuming). I would then 'finalise' the map, adding colour if planned, generally making sure it looks good.
Ironically I'm no expert on preparing for publication, as this work would go to someone else who would check it and basically add it to a book.
I'll continue reading that thread and if I think I can help I'll get back to you. Likewise, if
you think I can help, let me know!
A couple of maps here if you scroll down:
https://picsbytom.net/