See below on making your first loop
You then need to make a chain before starting any pattern(apart from those that start with a ring, but that for another time) in the early stages I found it easier to keep my tension looser than it would have been when I was knitting. When I didn't I broke the ends off a few hooks initially!!
This is the first chain and repeat until you have enough chains for the pattern. I am doing twenty before I start single crochet which is the UK double crochet.