ChromeOS is perfectly suited for your job role because it is highly secure; it can only run the Chrome web browser. Since all your work will be interacting with various web services, this is a perfect fit. Take a few minutes to familiarize yourself with the Chrome desktop using this orientation video (start at 0:47):
Now that you’re familiar, you may be interested in some optional Tips & Tricks or learn how to take a screenshot or how to enable accessibility features.
If you have a specific question, consult the comprehensive ChromeOS User Guide.