Hey, Charlee.
It's great to hear that you are getting on with building your site and it's understandable that some of it will make you scratch your head. I was exactly the same when I started. Lol Don't forget the search feature at the top of the page, I found it very useful when I started.
Your URL is the 'address', of your page, on the web. Now, in order to know what your address is, you will need a domain name. Do you have one yet? You get a free domain name when you sign up for a VodaHost hosting package but you can also buy them individually, either from VH or elsewhere.
When you do know your domain name, your URL (say for your index page, for example) will look like this:
http://www.mydomainname.com/index.html and if you had a Contact Us page that might look like
http://www.mydomainname.com/contactus.html where 'mydomainname.com' is replaced by your actual domain name. Each page of your website will have its own individual URL.
I hope that helps and remember to name your home page
index - no uppercase letters.
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The moment one definitely commits oneself, then providence moves too. All sorts of things occur to help one that would never otherwise have occurred. A whole stream of events issues from the decisions, raising in one’s favor all manner of unforeseen incidents and meetings and material assistance which no man could have dreamed would have come his way. Whatever you can do or dream you can, begin it. Boldness has genius, power and magic in it. Begin it now. (William Hutchinson Murray)