Snowboarding for the first time!!

Hey so i’m going snowboarding for the first time this saturday, I have a waterproof insulated coat and snow pants i’m just wondering what else I need? what do I wear under my snow pants and coat?

the weathers going to be snowing and 28°

I heard snow boots are pretty warm and to wear one pair of thin socks but my feet get cold and numb SO easily, so do I just wear a pair of thin socks or one pair of thick socks and get a bigger size boot? should I get a face mask? does anyone just have any tips for snowboarding in general! 😂