I am mapping my latest fantasy world, and I have run into a type of geography I'm not sure how to display. I have a region that I would like to be quite similar to the Appalachian mountains: low, long ridges in parallel with fairly narrow valleys between. How can I show this on my map?

I have often used Inkarnate for mapping, but their method of placing individual icons doesn't quite fit. These mountains I'm attempting to show aren't a collection of many peaks but rather long ridges.

I also like to draw by hand with pencil or use paint.net, but shading is something I'm not very comfortable with. Any suggestions would be appreciated. Attached is an example of the mountains I'm talking about as shown by google maps terrain view, followed by my currently mountainless continent map for this world, made in paint.net.
appalachians.png

Berelia v3.1.png