How to create a website?

[Kitty]

Slow down lol. First just try it out. The free websites. Play around with at the techy stuff. See how that goes first. When you pay for a domain name it will be created hopefully if yours is unique. When you are playing with settings and such you can save and it will be there when you comeback. Or if you publish it will be stored online on your website.
Your paragraph number 2. You are charged for things like bandwidth etc but if you become big like facebook you will have sponsors and people paying you so it won't be a problem. Once you just test it it will make sense. Make as many mistakes as you want and experiment with stuff. You can always undo and delete.