If you've read through the rest of the information in this area, then you should be ready to play your first game. Jump in and give the games a try. You might find that you have other questions, though. What do you do then?
We check the forums very regularly, so if you can't find an answer to your specific question, you can ask there. We try to respond promptly.
All of the rules for all of the games can be found on the individual game information pages that can be reached from the main page.
If you're a game publisher/developer and are curious about our technology, be sure to check out Metagame.
If you want to buy any of the games in their original tabletop form, we recommend Paizo.com. They have good prices, great service, and carry most of the games from our collection (those that are still in print, anyway). You can also try Amazon.com. In some cases you'll be able to find games there that are no longer in print.
So, that's it. You should be fully prepared to try out your first game (if you haven't already). Enter and give it a try!