Blogger is one of best sources for earning money online.
After you plan to write blog it's now to start blogging.
Go to official website of blogger, it is http://www.blogger.com.
Start your first blog. Try to select a topic which is innovative. Search and Google for getting information about topic.
One of important thing is not to copy any thing as it is. Change the words, Google has it's pattern checking and if it matches, they will not allow you to sign up for ad sense.
Mostly, people question about ad sense account. It is nor given in start when you post. But it can take a week or two, or even more in some cases.
Now start you first post today, and to get more visitors you simple need to publish it on all places Google,Facebook,Twitter e.t.c