if you have a wireless signal in your house, the Wii will see it. You DONT need to pay to go on their internet, BUT be careful in that some games cost money to download. They have free things, but they also have paid things.
its so much easier to just pull it out of the box, and get used to it. As you get used to it, you will understand what we are talking about.
Be patient, and wait for the machine to come. It will all become clear then. its exciting to get a new toy, yes?