All I can say is when you get to the spine lessons in Structure of Man those are probably the most important in the dvd set. Make sure you understand and can draw the spine connecting to the 12 bones of the ribcage. Then understanding the pelvis is very important as well.
But before anatomy use this link to Andrew Loomis's book Creative Illustration. http://http://fineart.sk/index.php?s=8&cat=13
Don't stop studying until you understand it and can do it. Before perspective or anatomy this is what beginners should start with, I wish someone would have told me this I had to dig on this site forever.
More important with this book is getting the Form Principle, and TONE. When reading the line chapter don't worry too much about the subdivivision methods.
Hope you do this, cause I wasted alot of time by not.
"Success is going from failure to failure without a loss of enthusiasum." Cliff Blezenski