You’re doing awesome for your first sculpt! Getting used to the tools is a big first step.
The second 2 examples look the most promising to me. I’d even try blending the methods together: Roughing out the shape first (like the 3rd pic, red mountain) then adding finer texture detail (like the grey mountains).
I’d like spend some time sculpting a mountain tomorrow during the casual stream. If you watch please remind me!
