Biographically Speaking

So, I signed up for a biographical writing class this semester because I'm primarily a fiction writer and love stories about people and those who overcome their struggles and what not.  I thought biographical writing would be the best way to continue on about learning the "realness" of people and that would in turn help me craft fictional characters.  I don't know how anyone does it!  Biographical writing is hard.  The pressure to find the very essence of an actual person is stressful.  Fiction writing is so much easier because you're actually creating the person in your mind and then letting it flow out onto the page.  In biographical writing the person is already created, and it's not someone that you created.  You might know their thoughts and dreams and feelings but to put those on a page in your words instead of theirs is not as easy as I thought it would be.  Should've taken poetry.