Buy the Book Walleye Trolling...It is a great starting point with lots of pictures and diagrams with explanations. It was Co-Written By Ross Robertson of Big Water Guide service (google him).

https://www.facebook.com/BigwaterFishing

I did a learning charter with him last May in Port Clinton OH. The guy is a Walleye Slayer! Like fishing in a bucket.

His way of fishing worked great up on the shallower Buffalo end of Lake Erie until the end of June when the fish moved West to the deeper water.