I'll have to go through my baby stuff, but we used a great book! Started at 5 months and my son started signing around 8 months. He had about 25 signs by the time he turned 1. I know a lot of moms also like "Signing Time" on YouTube.
We are working on basics like mom, dad, eat, more, drink, milk, and all done. We started with this baby at 9 months. All others we started at 1 year. We got 2 books from books a million. When I get home and I can send you the names.