Sending and getting commands through the Internet
Think about what you want to build. Are you firing commands into the blue (from the website) or do you use a camera for feedback? If you use a camera (or even GPS), think about the delays involved. A too large delay will render the remote control unusable. All in all it sounds quite complicated for a beginner project in electronics. Maybe you check out the Arduino ... it will make build something "touchable" (as you stated your intention) way easy. The Ethernet Shield will make hooking things up to the internet a piece of cake.