If you're looking for more opportunities to learn about Microsoft Office, you might be interested to know that Microsoft makes a bunch of stuff available on their website. You can browse around and see if anything looks interesting to you. They have Office for Windows training as well as Office for Mac training.
Some of the content comes from an online training company that I've been really impressed with, Lynda.com. If you are in the market for computer videos, you might check out their monthly subscription plans. For $25/month, you can watch quite a bit of video training. We subscribe to it for current BYU students and employees. If you happen to also be one of those, you can access our subscription here.