Affiliate Marketing Secrets

Please point me in the right direction.
I’m just getting started with trying to make money online. I’m gearing towards affiliate marketing because I don’t have a lot of money to spend. I don’t have my own product and never owned my own business.
There are many Internet Strategies and products that people are trying to sell. I don’t know which to trust. Some of them just want your money and not really trying to help you.
Is there a good mentor to learn from or site to get started with Internet Marketing mainly, affiliate marketing?
Thanks in advance!