How the booking system works is the most important as many people use their own code or short hand i.e. big D means Deposit Paid and so on and you will struggle if you don’t understand it. You can bring in your own system gradually if theirs doesn’t work for you but one thing at once. My top tip here is to buy a big notepad and write everything down as you can’t take it all in at once and then you can re read it all later.