Thank you both so much for your help.
I've managed to double crochet the borders around my knitted cardigan, but now I've hit another problem. I have to make button holes. The pattern says. (Work 2 ch, miss 2 ch). I think I understand the 2 ch, but how do I miss 2 ch. I know I probably sound really silly, but I'm struggling with this whole crochet thing. Please help?