Once you have that problem or need nailed, the next step is to validate that idea and make sure you’ve actually got customers who will pay for it. This means building a minimum viable product, getting objective feedback from real customers, incorporating updates, testing the market for demand, and getting pricing feedback to ensure there’s enough of a margin between your costs and what consumers are willing to pay.
I think that there is just a finite way of making money. Offline commerce also hasn’t changed in a very long time. You basically either sell products or offer services. The rest is just about marketing and finding clients. Online commerce didn’t reinvent the wheel, it just moved all these activities on the Internet. While the marketing side has changed over time, the overall principles were always the same.