If you get a tourist visa I think it can be extended. But now there is a very controversial law about people who do not work (at least, do not pay taxes). Even foreign nationals will have to pay TAX to government ( about $250 per year) if they do not have official income in Belarus and can not show that they pay taxes here. Better country to stay would be Ukraine (western part or southern), where war is far and prices are 2-3 times LESS than in Belarus. In next year Belarus economic situation will only get worse, currently thousands of workers have lost their jobs at factories and this trend will continue.