I really didn't meant to fllood you with too much stuff that is a bit hard to digest at once, and make you hate mountains even more, as i read on the other thread.
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I know it can be quite counterproductive in such a working stage, sorry! I actually wanted to give you some more practical hints focussed on the shading and linework you've done so far, but i'm unsure if it is even needed.
I admire your dedication working on all that with a mouse. I worked only for some months with a mouse in gimp and felt i was getting more and more comfortable with it. Now, after working for over a year with a tablet, i tried out drawing some mountains with the mouse again and have to say it's really challenging!
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Once again i feel deep respect for all the people doing such magnificent work with it...