Good morning Carol
The next piece of information from the beginners section is 'hitching up'.
The clickable link from the list doesn't seem to work but the red coloured link underneath the graphic does.
http://www.practicalcaravan.com/beginners/hitching.html
You should have an electric cable with your caravan, it might be coiled up underneath one of the seat lockers or perhaps in the front locker. This lead, usually coloured orange is your electric hook up (ehu)
At one end is a blue outdoor 'female' socket and at the other end is a male plug in outdoor connector.
On a pitch with electric hook up the 'male' socket plugs into the site electrics and the 'female' socket into a connector usually close to the battery on your caravan.
The current is normally fed into the caravan via a rcd which is switched to 'on'. If there is a control panel in your caravan select the switch to battery charger on and if there is a car and caravan symbol select the caravan switch to on.
Your caravan electrics are a mixture of 12v and 240v with the mains power normally to a couple of sockets and perhaps some mains lighting. The other lights are usually 12v and are powered from the caravan battery.
Here endeth todays lesson :0)