Becoming a professional full time blogger is easy. First condition is you should not be employed elsewhere.Next, you should be really hungry for money. I know many bloggers who are otherwise wealthy that have abandoned their blogs in just a few weeks. They just did not need the money.
Then, you must find out whether there is a blogger in you. I have a self revealing questionnaire for this purpose.
Money by blogging will take a minimum of 6 months to see the first sign of U.S.dollars. That too, your blog should have been updated with new and unique content three times a week and should have a backing with a healthy quantity of backlinks to gain a Google page rank of at least 3.
Natural blogging is a must but it should be interspersed with fairly well paying keywords.
Do you think you can do it?