Good luck with the surgery.

Related to the problem using the mouse in general, remember that quite a lot of CC3+ can actually be done using the keyboard. This allows you to even work one handed. Some things do get quite a bit more cumbersome, but it do allow one to keep working.

No, that's fine, but you shouldn't grab the navigation bar from an existing map. I customize that thing for every map. Just make your map normally without it. I'll add it myself when I process the map for inclusion into the atlas.

That sounds a bit weird to me. Since the scale is already correct in the source map, no resizing should be required. (Unless you are talking about the resizing the map border, since the map area of the original map would be way to large to just map a small portion.)

The atlas is at https://atlas.monsen.cc

Generally, the amount of reserved areas compared to the number of maps is quite low, so finding one is actually difficult, but if there are any reserved areas on the current map, there will be a button below it named "Show reserved areas". That that button does is just to enable reserved ares to show up with a hotspot just as the existing areas, meaning every hotspot marked on the map leads to either an existing map, or a place someone has reserved, while a non-marked area of the map is open for the taking.

You're probably planning to fix it already, but that farmland cutoff at the top looks a bit artificial being so straight and all. A few trees covering up parts of the edge helps a lot here.

Yea, you can put a lot of things on small islands. I've been to a couple of the Caribbean ones. Barbados for example is 169 square miles, which looks about similar to yours in size, and has a population of 300 000 and lots of interesting locations.