Hello (insert friend’s name)!
I’ve recently joined the band at my school and I couldn’t wait to tell you how excited I am to be apart of it now! As you know, I love playing the (insert instrument), and I’m so glad to be able to surround myself with people who love instruments as well. There’s this one (insert gender) in my class who plays the (insert instrument) and they’re really good, and they even offered to help me learn how to play it! We’re going to having our first show at my school’s football game in two weeks, and I would love it if you could make it!
I hope to see you then,
(Name)