@lauras0323 As others have said - there is a LOT of information on this forum if you take the time to look through. My number one piece of advice is:
Even if you’re unsure, pretend that you know what you’re doing!! DO NOT be a doormat. Don’t aim to comply with any whims that guests may throw at you. Aim to be professional, consistent and fair.
Take criticism calmly. It can be very hard when people critique your home. If that happens - take a deep breath and think it over slowly. Do they actually have a point? If yes, take it as constructive criticism and think how you could improve things. If no, just shrug it off and move on.