Thanks a lot for the feedback!
Here comes another update of the map, with what I think is all the mountains I want (more or less). However, seeing them all there, I realize that some of them are enormous! Especially the ones around the upper left corner

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To answer your question, the map is supposed to be a regional map, far from anything continental. Can't say any figures because I actually haven't thought about it. So thanks! I will consider it more, and perhaps add a scale bar to make it clear.
Furthermore I have a question for any Cartographer here that know the answer and wants to help out. When drawing coastal waters, what style is the best when it comes to a regional map like this one? Does any of these quick-drawn examples work? Thanks in advance

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