@anisso, I honestly don't speak or fluent in polish but I can understand like 50% ( when it comes to topic I know, it's easy to understand) I'd like to say I am also following the same journey like you. I wrote about minimalism occasionally. And It's been life changing journey but I still have a lot to get rid of.
My journey was inspired by podcast the minimalist.com - I wonder if you know these guys or ( watch, listen). I do agree with you that minimalism somehow helped with saving and of course, creating more space for apartment. I just hate to look at cluttered items in my working environment !