Shalom Ari. I think that our maternal ancestors were from the same Semitic tribe, which dates back 8,000 years to Iraq, Yemen, and Morocco well before the time of Avraham Avinu. Percentages Sephardic, Ashkenazi, and Mizrahi are interesting but according to Halacha (Jewish Law) there are two ways to be Jewish. Either your mother was Jewish, you converted to Judaism, (or both). Percentages don't matter from a Halachic point of view. Genetic analysis may help to rule out or include hypotheses regarding lineage, but mtDNA determines whether your mother was Jewish. My mtDNA shows multiple Sephardic, Ashkenazi, and Mizrahi markers. I can go back about 10 generations to the Netherlands using genealogy. They were Huguenots, or at least they presented to the public this way to avoid persecution. To go back father than that requires an examination of history. Many B'nay Anusim (children of Jews who were forcibly converted from Judaism to the religion of their oppressors) took Huguenot names. We are very fortunate that we live in an era of technology when we can probe our past beyond where we can go with genealogy.
Whereas you don't know about your maternal side, I have lots of questions about my paternal side. Our family has an Italian last name but Y-DNA shows English ancestry and a descent from Sir John Field, the noted British astronomer.