You'll need a place on the Web to put your files. The examples in this course - the screenshots and so on - were made with an account on Reclaim Hosting.
Reclaim specializes in serving students and universities. A basic account costs $30/year at the time of writing. A domain costs another $15/year. A domain is something like tastymonkeybites.org. You need both hosting, and a domain, for a total of $45/year.
Note
I don't know the people at Reclaim, or get any referral fees. I recommend Reclaim because it's cheap, and has what you need for the course.
Cheap is good.
You can use another service if you want, though some of the screen shots you see on this site might not apply.
Before you sign up, pick a domain name. Funny is good, but it should be something you could show you grandmother. As I write, tastymonkeybites.org is available. So are:
doggozand.meaudaciousparrot.netjackoutofthebox.me
Now go to Reclaim Hosting, and get yourself some juicy server space.
If you're having trouble getting access to your site, here are some things to check.