I think the best way to start at 13m would be to use Little Reader five days a week and go from there. But if you dont want to spend the money then get some books out about early reading.
Im reading
Raising Confident Readers by Dr J. Richard Gentry. Its very good
I found this site helpful when I was just starting out
http://www.childandme.com/Read, read read and research and you will find the best thing for you and your child.
This forum is full of advice. Check this recent thread about Sign language
http://forum.brillkids.com/teaching-your-child-signing-speaking-foreign-languages/sign-language-with-hearing-toddlers/Have fun and just give it a go