@Kogut-Domowy You don't need a VPN...
Long story short, you can just use the "PLAY NOW" button to go to the web version of the MS Store and change your region at the bottom left to US and 'add to cart' to add the game to your library. Once there, without needing to change regions, you can just go to the MS Store "Library" and select the game from there and set it to install.
Also yea... the initial release was a "North America only" release but all that means is that they aren't officially servicing just yet... unlike JP, the Terms of Service say nothing about playing from outside of North America. Also an official global launch is slated to happen this year, when that happens you don't need to change your platform's regions or anything like that to play.