A good idea is to create a website and do with it what you are passionate about.
I own an online store and locally sell cosmetic products brought from other countries.

The biggest investment was in the creation of the website, and the monthly invest in marketing. But that's the beauty of doing business online, you don't have an office or a store to take care off. Owning an online business is much cheaper than owing a real world one.

An agency created the website in a few weeks, and https://pagewon.io takes care of promoting my website monthly.