“Security at the expense of usability, is at the expense of security.” – quote from the web
It doesn’t sound right that you have to become your own cybersecurity expert just to keep your digital world safe. On the other hand, online, networked, and password-protected is a good deal of the world we live in, so you can’t go wrong spending an hour or two on a little interesting follow-up reading.
Highly recommended is How big is your haystack?, an awesome page, readable and entertaining, that goes over everything in this course in more detail AND has an online calculator that you can use to illustrate all that you’ve learned. Plus, it has some great additional links at the end.