Halloween cookie decorating at Joanna’s house

Does anyone know how to decorate sugar cookies? I’m new to it and want to practice before Christmas. Let’s get together to decorate Halloween cookies. I can prepare one dozen sugar cookie rounds per person and provide some royal icing. I am hoping to learn a thing or two from you. You don’t have to be experienced, we can learn together. Donations accepted to offset the prep expense but not necessary. I can host 5 guests.