Hey guys! I just found some more resources that may help you with your artwork.
CtrlPaint.com has a bunch of tutorials on Digital Painting.
www.ctrlpaint.com/library/
Unlike CtrlPaint, Proko uses traditional methods in his videos on how to construct proper anatomy. He also has great art tips for traditional and digital artists alike.
After you've watched a few tutorials, you can use this website's gallery of poses to practice working on your anatomy.
artists.pixelovely.com/practic…
I hope you enjoy!