you can avoid all dicks on your screen, if you use a walkthrough ( I did it), but be prepared to be punished for not letting paladins fuck your Fem Character to get a class. Or if you refuse to be gangbanged by orcs you'll not get to finish certain quests, certain characters may talk as if you had certain scenes that had dicks regardless of if you refused, etc.
So, technically you can't be a lesbian, since fem protag in this game is there to be gangbanged or for bestiality. Also expect to have very few scenes with companions you may want to romance. Unlike the male protag.