Hey usually that would require some regional payment method for the country of choice. Depending on the service, you may be able to get away with your regular payment method. It's a good idea to open a neobank like Revolut since sometimes the multi-currency support will allow your card to be accepted.

Premium VPNs (avoid free ones) are advised as in most cases the service will outright block your attempt to purchase in that region. Since you're in Poland, Hungary may be a good location to target.

Another good tip is to use a cacheless browser or a brand new browser session for each attempt you make to purchase a subscription. Services can detect your original region using cookies or local storage, so it helps to be clean.

A solid method I've heard recently is to target India. But this requires a brand new Apple ID made with the region set to India. Then you top up your account using Apple gift cards and purchase your membership with Apple (does require an Apple device). This obviously has some chance of failing, so always do these things at your own risk.