It would depend on your skillset. What are you good at?

Making money at business is the same for everyone:
1) Identify what skills you could monetize. If you do not have skills then you need to invest either a) time, b) money, or c) both into acquiring said skills.
2) Find a market for your skills.
3) Convince them to trust in you.

Of course this is best suited to freelancers and consultants.

If you want to sell a product then the process is much the same. You still require the right skills in order to make your digital storefront a same. The only difference is now you are trying to convince someone to purchase a product rather than your own skills (you are not the 'product' anymore)

There are not easy paths to earning money online (or elsewhere) -- put in the work and get the rewards.

Source: Have been making money online since 2012.