If you have a home Wi-Fi network and you can’t connect your iPad, then try rebooting your router. Make sure you leave your router off for about a minute before reconnecting. After your router is back up, restart your iPad and then try to reconnect. If this doesn’t work, then go to Settings, Wi-Fi, Your Network Name and choose “Forget this network”. Then, restart your iPad, go back to network settings and try to join your home network again.