I really like these, @William P! Nice brushwork and overall feel, especially for something you’re not very familiar with. There’s a lot of good courses and resources about digital painting throughout the internet, but, honestly, from what I’ve seen so far, I’d say my favorite one is CtrlPaint: http://www.ctrlpaint.com It has a big library of free very helpful, informative and nicely edited tutorials. They also have a bunch of paid series which I personally find to be quite affordable and worth the while. I learned a lot there, and, in fact, most of the main digital painting techniques I still use came from their lessons. Keep up the good work!

Great digital programma's is krita an it is free. look for books like" imagine fx" Work whit opacity layer, layer's and brush strenght, textuur and buy a wacom tablet. good luck