If you are new and inexperienced to using Chainsaws, then please make sure to view the videos outlined below which outline the basic principles if using a chainsaw, how to safely use a chainsaw and also how to maintain and fell a tree with a Chainsaw.
Video 1 - How to Use a Chainsaw
Video 2 – How to Start & Use A Chainsaw – Basic Tips
Video 3 - How to Safely Use a Chainsaw, Basic Tips
Video 4 - How to Fell a Tree with a Chainsaw