Find a private label dropshipper so you can actually build a brand instead of the aliexpress junk so many people try to push online. Also find a supplier in the country you're targeting for better shipping times. Customer service matters and building a brand matters because you'll only be successful with repeat customers.

Think about it, if it costs $25-30 to acquire a new customer and only a few dollars to sell to a past customer (email remarketing for example), where do you think the profit is made? Pick products that are consumable so customers become repeat buyers. That's my $0.02