When you decide to apply for a residency permit in Poland, you cannot just go there and file your application. Maybe before it was like that, but now they changed the process, meaning if you want to apply for a residence permit, you have to take an appointment online, then you have to visit the immigration office.
On the other hand, if you want to apply through an embassy in your country, you have to keep in mind many things. To read more about appointments, we have a super supportive blog for you to get an appointment and file your case at immigration. To read it, you have to click here.