Let me disabuse you of that notion right now: making money online is not so easy and you actually have to know what you’re doing. 10 years ago when self-publishing was booming and affiliate marketing was in its infancy, you could get rich with some sketchiness. Those days are long gone now. Self-publishing has matured and it’s far, far harder to propel your way up the all-important rankings. Google has come down hard on the spam and if there’s any hint of that on your websites, you’ll get penalized which means no search engine traffic sent your way. This is the death of the Internet marketer.
I have only dabbled in drop-shipping before when I had an eCommerce platform 6 years ago or so. I think it is something that you could do on the side, but you would want to do in depth research on the industry you want to get into before setting up shop. It may be a little less passive up front, but over time you could take your hands off the wheel.