No problem - let's lots to learn with KML but it's a creative thing with immediate results and if you find it interesting, you'll have lots of fun!
KML is very comprehensive and there are many things that you can do with the code that you can see in GE but can't create or manipulate with the application. This is where external KML generation (manually editing text files, scripting KML code and using third party applications like the Circle Generator).
Spend some time looking round this community and you should find lots of help - and keep asking questions if you get stuck!

Simon.