Probably the best place to look for general information is on the Caravan Club website. Check the bottom of the home page and there is help on most things and access to useful leaflets. If you have specific queriesplease post them on here and someone is bound to kmow.
Not sure what equipment you have but a fair bit is needed. Off hand you need gas, an electric hook up cable, fresh and waste water containers and waste outlet pipes and a leisure battery.
Inside basically you need bedding, cutlery, pans crockery and a kettle but most of these can be brought fromhome but melamine or similar crockery is more likely to survive.
You will probably have to reverse onto your pitch which is something you learn with time. You neeed to be just past where you want to pitch and you use opposite lock to turn the caravan. It sounds difficult but you do get the hang of it and there is usually someone around who wil help. Do not be afraid to ask.