You double crochet right into the first dc of the first round; don't join the rounds and make a new one, just keep going in a spiral. (I also use a single crochet in the first stitch of the magic ring and then follow it up with eleven double crochet whenever I don't start with 6 sc; this allows for a more natural spiral to form, I've found.)
Re: DC second round after the magic circle
I hope that helps!