Upper Left Photo: This is how the first double crochet stitch looks when it is complete. Next, you'll work 9 more double crochet stitches into the same chain stitch for a total of 10.
Upper Right Photo: Here's how it looks when all 10 of the double crochet stitches are complete.
Lower Left Photo: The next step is to close the circle. You will do this by working a slip stitch into the beginning part of the round, as follows: Insert your hook, then grab the yarn with your hook;
Lower Right Photo: pull the yarn through. Be sure to pull it through both the circle shape and the active loop on your hook at the same time. It will look something like this when you are finished.