Re: How to place ad in Google adwords
Nice to hear you're interested in AdWords.
There are plenty of things to learn while working with this system. The good news: the majority of them CAN be learned in the process of working.
For the beginning, I'd suggest you reading this article which covers the main things of AdWords. You'll find the basics of the basics there, but it should be enough to start working with it.
I'm sure you'll have loads of questions after you open your account and set up your first campaigns, so I'm sure this community and the extensive AdWords Help portal will help you.