I've been wanting to learn to do granny square since I saw some beautiful ones on line. Here is one site that has some beauties.
I tried some different instructions on line but what helped me the most was this
You Tube tutorial and I've been practicing today. You need to know how to do basic crochet but there are instructions for that on line too. My tention needs to improve, but I'm getting the hang of it. I need to get some of those beautiful colored yarns that I see being used. I think that is really why I suddenly like granny squares. They are so colorful and cheerful.
Crochet is one of those things like knitting that I have to kind of learn over again ever time because I don't do it that often, but granny squares are actually quite easy.
This site is doing A Granny A Day Challenge and is doing crochet instructions.