Using eBird is easy once you get started. Here are some helpful links explaining how you can get started using eBird.
How do I enter sightings in eBird
Getting started with eBird Mobile for your Smart Phone
Understanding eBird Bar Charts
How to find a new place to bird by exploring Hotspots
How to make your checklists more valuable to scientists
If you have other questions check out the extensive eBird Help section