Getting Started with Trombone - Please watch these two videos. Practice assembling, holding and disassembling the trombone using this video as a guide. Trombone Lesson 1: Assembly, Disassembly, & How to Hold
Please use the following video which demonstrates how to make a sound using the mouthpiece of your trombone using a technique called buzzing. This video also introduces some basic notes once you feel you that you are ready Mouthpiece Buzzing and First Notes