I don't know the details about buying ETFs in your country, but generally "managed" funds or ETFs have higher fees than ones that simply track an index. SPY or VOO tracks the S&P 500 in the US market and there may be something similar for your country's stocks. Or maybe you can buy shares of these US ETFs on a low fee app like Robinhood, or by creating some sort of business entity somewhere in the world which has access to the US markets.

Probably best to contact a local accountant or lawyer.