Those look great!
I too just started kniting at the begnning of the year and have allready made two pairs of longies. We do use them for CDing and they work great!
I don't think they are hard at all. Basically it is just ridding for the waist, knitting solid for a # of inches, a few short rows in the butt area and knit for a few more inches, split for the legs, do one leg, then the other, and graft the crotch. Tada, you have pants, whatever you use them for... Thay are adorable!!!!!!