Very nice! It looks like you've already seen the Zombie Nirvana tutorials. Are you using Photoshop?

I think the best advice I can offer is to look into buying a drawing tablet, and then take a look at Hapimeses' mountain tutorial. http://www.cartographersguild.com/showthread.php?t=1669

Hap's process will work in any raster drawing application--Gimp, Photoshop, Painter, etc. We keep hoping he'll do another one for other terrain types, but it's been a while since we last heard from him.

Anyway, welcome to the Guild, and I hope your connection issues don't continue to plague you.