Since you’re going to spray the parchment with cooking spray, it’s going to make it easy to make slices and lift them out of the pan. You want to make sure the cheesecake is cold and firm. If you want to transfer the whole cheesecake onto a platter, use two or three large pancake turners to carefully lift the cake over and off of the parchment. It helps to have two sets of hands doing this maneuver. You also don’t have to use parchment, I’ve made many cheesecakes without, just using cooking spray and there might be a little sticking, but nothing too detrimental. It’s a risk. Good luck on your first cheesecake, even if it’s not perfect, it will still taste amazing!