Angels have the Phone Box
Hi Vanessa. That's great news! @Brink, the tutorial creator will be pleased to know this.
Yes, backing up your stuff is a must! I would recommend a program called Macrium Reflect Free. You can make System Images of your complete hard drive setup, so if anything goes awry, you simply restore the backup and you're back in business. It also comes in handy when your hard drive dies and you have to replace it: restore the image to the new drive, and you're up and running in minutes.
So glad you got things sorted! Cheers!