1st one is pretty good Kero, obviously it's not going to be pro because you're new with this type of thing,
but I'm actually impressed with this considering you being novice with DP's.
Things to work on would be shading and implementing some definition.
If I had a tab I would be right there with you learning different brush settings and techniques.
I would imagine on something like this, that you would use a few different brushes on the peaks,
to try and bring out more detail in the crevice areas.