Graham bemethavinci Study what you need to create your site the way you way want it
As with every subject you need to start with the basics
copying stuff is fine thats how we learn any subject just learn something from the stuff you copy
Even I still learn something new every day and I first touched a computer as a child at a British army display in 1972 ! ( Yes I am really that old ) It took up 2 lorries and a squad of support personal and did not even have a screen just a text printer!

http://w3schools.com is a good place to learn the basics
http://developer.mozilla.org/ is a lot more technical
http://stackoverflow.com is a technical site and forum with millions of solutions and examples on every subject of computing