You didn't mention which kind of business you are interested in. I personally could try this:
* find a good product with rewarding affiliate program
* register a web page with a hosting service that offers USD 75 Google Adwords voucher (there are quite many)
* build a web site that markets the product you chose
* use the Google Adwords voucher to drive traffic to your site
If have succeeded well in creating the web site and choosing the product, you should now be earning real money.