Manuel, good advice from Phil and my colleague Parksy. Join the Caravan Club www.caravanclub.co.uk and see what they have to offer on the website for the sort of assistance you are looking for. Also, look for the address and contact details of thier local section nearest to where you live. Establish a contact with the section, tell them what advice you need and it is very likely that there will be an experienced caravanner not all that far away who would be happy to talk to you directly.
Alternatively, walk round the neighbourhood and see who has a caravan parked on their land and whether this bears a CC badge. Politely ask if they could assist.
The problem we have is that - through absolutley no fault of your own - you don't know exactly which questions to ask and that we ( other forum members) may have some difficulty in pin-pointing exactly what it is you wish to know.
Several 'caravan' items may be referred to by different names by different people - e.g. some refer to the legs which support the caravan as steadies and some as stabilisers, whereas to the majority 'stabilisers' are things on the tow hitch which stop the caravan swaying when under tow (I simplify, but that's the general idea).
Basically, when on a pitch and disconnected from the car, the caravan should be level both fore and aft and side to side. Fore and aft is relatively easy. Unhitch the car and wind the jockey wheel either up or down until the van is level. Use a spirit level to check this, although slightly nose up or down is not a problem. Then wind down the steadies or legs found at each corner of the van to hold it there.
Side to side is a bit more tricky as you may need to use a ramp under one wheel or the other. Again you need the spirit level this time across the caravan, and you may need to pull or push the caravan up a ramp on one side or the other. These ramps or levelling boards are sold by dealers. It is better to lever side to side and then front to back.
I could have demonstrated this much faster than I have typed it, which make the point about direct contact with an experienced caravanner being the best way of finding out, after the advice contained in Beginners on this website and from the Caravan Club.
I hope I haven't confused you too much - it's a great hobby, pastime, way-of-life, obsession so stick with it and in a few months you will be right on track.