Start by writing down information about your family members. The files from the last 80-100 years have not yet been entered into the state archives, they are stored in the registry offices. If you are looking for older documents, determine the names of the places where death, birthday or marriage was registered. Enter the names into the search engine "Search vital records" and check whether the files from specific years are in the register and whether they contain scans. Use the indexes found in the content of the registers. Remember that documents from the former partitioned territories were written in Russian or German, and church registers in Latin.