If you plan to study at the Faculty of Economics, or the UMCS in general, consider application for a scholarship programme offered by the Polish National Agency for Academic Exchange (https://nawa.gov.pl/en/students/foreign-students). You can select one from several programmes available each year. Those of you who are interested in Business Analytics (BA) or Data Science (MA) study programmes at the Faculty of Economics will find The Banach Scholarship Programme as the most suitable option. Application for 2022/2023 academic year is due but get ready for the new edition for 2023/2024.
See also https://study.gov.pl for more information on the higher education system and important queries about studying in Poland, or http://www.go-poland.pl for interviews with graduates with their remarks and advices.