Selling Product on internet is a good business ,but How you start is a big question??
Start Point : For this business you required a good website having lot of visiters per day.If you make it then only you can able to sell products online.
How to start : if you dont have your site and if you are not much technical then also it is possible.make you own blog on blogger.com.Start blogging on any topic .Once you make good number of posting like >300 .Then go to clickbank.com.Take any product ads from there.After selling you will get a good amount of commision.
So what you are waiting for start blogging today only...