The greatest asset of an ordinary person is time, which is the 24 hours in a day.

Find something that interests you, that you like, love, and can make money from.
Devote all your energy, attention, time, money, and resources to it, and focus wholeheartedly on becoming proficient at it.
Try to let go of all trivial matters, and spend 3 months to 3 years focusing and honing in on this one thing, collecting and researching as much information as possible about it and this field.
Then practice madly, improving little by little.
While practicing, also research how to monetize and make money from this thing.
Material rewards are hard to sustain.
If you can't persist, there will be no deep accumulation, no mastery, and no competitive advantage.