To find a biography, go to the University Libraries website and select Advanced Search.
Choose Search for: Articles and More
Material Type: Book
On the first line copy and paste this search string:
biograph* OR autobiograph* OR diary OR memoir OR narrative
on the second line, describe your desired topic - think broadly!
AND Latina OR mexic*
Then, if necessary, on the third line:
AND women Or female
Here's the results list that search creates: 669 books
For historical persons, look at the options under "primary documents" for lots of ideas and places to look.
Try Wikipedia, of course -- remembering the caveat....