Making the top starts with placing six links inside one closed link. This our step 1. To make it easier for you, I've colour coded each step, by using differently coloured links.
With this, the initial closure is done. Now you just start adding more rolls. You will have to repeat step 2 and then use step 3 to turn the corners.
Eventually you will come out with something like that. It should roughly cover the top of your head, so measure it accordingly. Don't worry if you make it too big, actually make sure there is plenty of room for hair&padding.