You seem to have some reasonably good maps in your galleries.

Have a really close look at other maps for sale in the same general category as yours. There are quite a few out there that aren't made by humans these days, but you can usually tell because AI doesn't recognise the difference between roads and rivers (just one of the more obvious examples). Once you've weeded out the AI stuff, look at the prices the human artists are setting for their work, the quality of the goods (size and resolution), and compare it with what you are offering.

The final price per copy is up to you to decide, and you might not gauge it right the first time. Better to be a little higher than too low, so you can drop the price if you don't sell anything. Once you've got it right, though, pricing the rest of your work after the first few will be a lot easier.

There hasn't been an update to CC3+ for some time, so an update is an unlikely cause.

I'm not very familiar with the use of the tool, but check that the lines really aren't there - that those which vanish aren't just on a sheet below something else, or aren't just the same colour as the background.

20 minutes :)

To me, FT3 is a way to find and/or sculpt new worlds, rather than detail existing ones. It's quite a lot harder to use if you already have lots of ideas already set in concrete.

It might be easier to start this in Campaign Cartographer by creating a world sized map (each map unit is either a mile or a km), and drawing the predefined parts of the world as simple land shapes using the native land drawing tool. That way you can try out land shapes for the rest of your world relatively quickly, rather than sculpting and resculpting in FT3 several times over, which takes much longer.

If you want to add number labels the easiest way is to add text labels using this button: |CC2TEXT|

A dialog will appear, into which you type your number and hit enter. Then the number should appear on your crosshairs to position wherever you want.

While the number is still on your crosshairs you can alter the alignment by hitting keyboard keys as follows:

Horizontal alignment:

• C = centre
• L = left
• R = right

Vertical alignment:

• M = middle
• T = top
• B = bottom

If the number is too large or small, before you place it hold down the CTRL key and move the mouse until it is the right size. Set your size with the first number and stick with that size.

EDIT: Also do as Steven suggests and check that your TEXT sheet is near the bottom of the list of Sheets and Effects.