YAY! It worked!

DrByte, thank you so much for your patience with me!

Also, just wanted to mention that as I was just trying to figure out why my html was not showing up in my test e-mail (I'm sure I'll figure it out eventually!), I came upon another way to set up the Newsletter Test Group!

Admin > Configuration > E-mail Option > Newsletter Test Group E-mail (very last setting)
You just enter the e-mails in there! Who knew?

All the best to you!