Before you even think of that-- do you have a Sri Lankan business license and a Payoneer account?
Without those you cannot get paid.
As for products, SELL WHAT YOU KNOW, KNOW WHAT YOU SELL.
Don't sell anything you don't have in your hands. That means, don't dropship from China.
If you are a plumber, sell plumbing parts. If you are a barber, sell hair and skin* products.
And there is a huge diaspora of Singhalese in the world. What might they be homesick for? Tamarind paste? Jaggery? Lemon Puff biscuits? Red rice? Cinnamon? Dried seafood? DVDs? CDs?
*Skin lighteners are illegal in Canada.
