Mark glad you like the dvd, and you are learning a lot. Its important to me to make my tuts easy to follow and as easy to understand a possible.
There are plans for more tuts....
The reference issue can be tough there are a lot of sites on the web that have great reference just do a google search to start.
I am enough of an artist to draw freely upon my imagination, knowledge is limited, imagination encircles the world. (Albert Einstein)
https://www.artstation.com/kurtb