Need guidance on mountains - shape, size, shading

[QT3.14]

Hello cartographers,


I've recently started trying to draw maps - I was working on a D&D Campaign and I figured, well, I need graphics. I need a map! Let's do a map! Sooner than later I found it to be not as easy as I thought it'd be - but I've fallen in love with it. Like, love at first sight.
Now, I'm a total beginner - fortunately, at the moment I have plenty of free time, so I've been practicing pretty much non-stop. However mountains .... whether because I have no artistic background or much knowledge, or because they're particularly difficult - or I am particularly difficult, I can't seem to figure out a way to draw them.

Precisely, I am looking at a way to display mountains on a world map and on some localized maps. I've attempted the triangle option, the "draw it in detail and make a brush" option and the "make a texture and apply it" option. None of which I particularly like.

This is what I've done so far:

a) My latest mountains. They still don't really look good to me, what could I do to improve?
https://imgur.com/a/T4BwL1T

b) The latest attempt at a map where I used brushes of mountains I drew individually
https://ibb.co/m6zPon

c) The previously made map where I drew the triangle version
https://ibb.co/e04qTn

In c) there's also attempts at hills, which I like how they came out, and a forest - which absolutely boggles my mind as well.

I've gotta mention that everything I've done so far has been done using your guys' tutorials. What can I do to improve on my mountains (and forests)?


Thank you!


EDIT: I'd like to keep things as hand drawn as possible!