There are several ways to make it on line but you will have to be very careful. many will charge you a fee to buy into the program, others will want to seel you books and tapes. Some will offer ways to make money reading emails, writing blogs, taking surveys.
The truth is you have to have a niche and a following so that you have someone to sell to, either people you know or a list of people you can contact.
It takes time and it takes effort, but you can make money, just don't believe all you see and the get rich quick never work.