When you have little capital, you definitely cannot start a very big business or even have meaningful investments in stocks, bonds or even real estate, since those require something tangible to see good profits overtime.

I can advise you to start with agriculture if the cost of leasing a fertile land is cheap in your country. In my country, you can literally lease a plot of land for a year with $5 or less. You can go for Plantain and cassava for a start, I love plantain because the plant sprouts out multiple suckers to replace itself when it is harvested and you can get many trees from just one within a year and that would multiply your dividends and It's maturity duration is barely 6 months or so. Cassava is still good as it has varieties of applications.

When you have made good amounts from Plants, you can diversify into livestock with adequate trainings, I believe few years into agriculture with consistency, you would make a lot of profits starting out with small capital.