Well done on that buy and welcome to cat sailing.
First day in water should be safety functions focused.
So turn the boat over in water at beach and have a good look at the bottom of it so it does not confuse you when you flip it out deep. Think about how to get it up the right way and let it flip down into the water. This will let you know that you do not want that hull coming down on your head. Push it out past your waist and then find out how to get on it. See it like a monkey gym, something that you are happy to climb all over any side up.
I know you will just want to get on it and sail but this twenty minutes will prove really valuable.
Remember when the boat has flipped, first let mainsheet and downhaul off.
These boats are so popular and so many people are good at using them you wil have a great learning curve as experience is everywhere.
Have the very best time out there as you have purchased a huge amount of entertainment.