STEP 1: Contact the candidate for the supervisor and present your idea for a doctorate. If the supervisor accepts it, you can get his consent.
the supervisor candidate's consent (in Polish and English) - the supervisor candidate
is selected from the list of supervisors for a scientific discipline announced on the
UKW website at the beginning of recruitment
https://doctoralschool.ukw.edu.pl/jednostka/doctoral-school/the-list-of-resarch-topics
STEP 2: Prepare the required documents and register in the IRK system (Candidates may register in the IRK system from 16 to 31 August 2022)
https://irka.ukw.edu.pl/en-gb/offer/registration-select/?next=/pl/offer/rekrutacja2022/
More:
https://doctoralschool.ukw.edu.pl/jednostka/doctoral-school/recruitment-rules