Both the Unblinking Eye and Alternative Photography sites are good sources for information and "how to" articles. There is an article on methods for coating paper here .

I used to do quite a bit of Van Dyke printing and tried both a rod and a hake brush. I settled on using the brush. The easiest way to learn to do it is just to do it. It really is easy to make a print. Consistently getting good prints is a bit harder but learning how to do it is part of the fun.

There are several people here on APUG who are experienced in Van Dyke printing. The articles on the other sites are a good starting point but, for specific questions, I am sure you will find help here.