where to start getting becoming Jewish when family roots discovered

Hello, I have been reading things on this website for a year or more and am finally getting up some courage to ask for suggestions about where I can start becoming Jewish after discovering some roots on my mother’s German side of the family tree –studying it for the first time tipped me off.

It would seem like between my maternal great grandmother and maternal grandmother, the Jewish background was hidden as these German Jews of means fled Germany between World War One and Two, landing in Brazil for a number of years before coming to the United States.

The assimilation continued but certain things struck me as being Jewish — for instance, even though the family affiliated with a Lutheran Church (I myself was confirmed in my early teens), my maternal grandmother said things like Judaism is the only true religion. Then there are some food/cultural things like the kugel my aunt makes for Easter based on “an old family recipe.”

I had begun getting my feet wet by doing a lot of reading and going to services at local synogogues. I am trying to figure out how to keep growing into Judaism. I feel passionately about preserving this almost lost part of my family. To the best of my knowledge, I am the only one with this interest in my family.

Thank you for any insights or suggestions.