Re: I'm a new advertiser on Google AdWords, please help me.
I recommend that you begin by reading the material in the AdWords Help center so that you understand the program and the decisions you'll be making.
I also suggest that you read Expectations & Goals Using AdWords. It's important to understand what you want to achieve with your advertising.
If you have specific questions, you can always post them here. Good luck!
Google AdWords Top Contributor