I dont know how to get sign from my home internet

you go into the settings app on your ipod. and then the first option you get should be "Wi-Fi." you go in there and it should have your home network on that list (assuming you're in your house). if it doesn't, you have to manually type in your network name (via the "Other..." option). then you have to enter your router's password (assuming it's password-protected). if it's not protected, then you should be set from the get-go. if you don't remember setting a password, that's because most routers come with a 26-digit WEP key. you should probably have this written down somewhere. if you don't, most routers have a website where you can find out through entering your router model number. 
hope this helps ;-)