First sign up at Google adsense Google Adsense
You DO NOT have to pay anything to sign up for a Google Adsense account.
You can get one totally free by Google Adsense
From there you can learn everything a beginner needs to know about getting a Google
Adsense account and how to start making money. Read everything You can to get the most out of it.
For the novice internet person. The best place to start is a blogger website like here at Blogger.com . A blog could be anything from an online journal, to your account of todays latest events. Very simple once you get the hang of it. If you have a specific knowledge of something, write about it. Along with your writings, you can add a little snippet of code that will produce google ads. When people click on these ads, you get paid. (Make sure your read Adsense TOS "Terms of service") You can not ask your visitors to specifically click on these ads.
The ads are revelevant to the words that you are posting. Example: If you were talking about a new brand of supplement whey protein powder that you find very tasteful. Then the adsense code would pick on on certain keywords and produce ads of supplement companies. Pretty cool, HUH?