bal run hello.bal If you were looking for something else (like a Ballerina doll download, game, or other software), always avoid unofficial or pirated download sites offering "Ballerina pobieranie za darmo" (free download). These often contain malware.
bal version You should see the installed version number. Create a file hello.bal : ballerina pobieranie
I notice you're asking for a guide on — the phrase appears to be in Polish, where "pobieranie" means "downloading." bal run hello