Welcome!
Be sure to get the Stihl "Chain Saw Safety, Operation & Maintenance DVD".
This will teach you about lowering the depth gauges (rakers) on your chain and doing it safely (cuts fastest), how to saw so if there is a kickback, you will not be injured or the injury will be minimal. How to prevent kickbacks in the first place, etc.
I showed this video to a friend who has been using a chainsaw for years and he said he learned quite a bit. Frequently while watching the video he said "I never knew that!"
Basically get chaps, chainsaw protective gloves, safety hat with ear/head/face protection, watch the video, and you will be able to saw safely. The above items are called PPE or Personal Protective Equipment.