If you are able to access the internet whilst on board, look at some basic knot tying. (There may be guidance in your skipper’s manual too.) There are loads of YouTube videos and other websites. A round turn and two half hitches is a good knot for a mooring post as is the good old clove hitch. Both are very easy. Don’t wind your ropes round and round the mooring posts as some do, take the loose end back on board and secure It to a cleat.
Do take an early opportunity to read your skipper’s manual, it’s something that all too often gets ignored but the information in there will be invaluable.
As others have said, take it slow and steady and above all enjoy.