Hi there! Welcome on the site
Take your time to explore, you can read the guides and the "Help on the game" part of the forum to discover the basics. Don't hesitate to ask if you have questions, the community is mostly french-speaking on here but you should always be able to find players or admins who speak english
You're lucky enough to arrive just at the beginning of two events, a customization ball and a gift-giving pie battle. You might not have time to get a creature ready in time for the ball, but there should be another one next month, don't worry!
Have a good time playing, and good luck in the battle!