Hi Aurora,
I read your posts with much interest. I am impressed that you have stuck around here for a year despite some of the posts that probably seem like siblings hashing it out in the living room!
Don’t be discouraged if you don’t have family records to document your mother’s lineage. There are sites like ancestry.com that have excellent census and immigration records, and their collections are constantly growing. My genealogy research was motivated by my hope of finding hidden Jewish relatives that would explain my drive to convert. I did manage to discover that two of my ancestors were Mayflower passengers. My great X 10 grandmother? Not a Jew. LOL…
My hope for you is that you will have hatzlacha (success) and thrive in your path to discovery of your Jewish lineage!