Now that you've got the basic grip and spin down, it's time to practice. Find a nice, open space and start throwing that Frisbee around like crazy. Don't worry if you don't get it just right at first - practice makes perfect, after all!
As you get more comfortable with your throws, try experimenting with different techniques and styles. You can even try throwing with your non-dominant hand - it's a great way to challenge yourself and improve your overall skills.