I need to choose a character in the play and have information such as familly life, education, likes dislikes, hopes and dissapointments, values, motivations etc...

I know this can be long to do but i honestly have no idea who to choose and what to write and i would really appreciate if you could help me! Thank you! (i have only read up to act 2 so the information needs to me from act 1-2 not 3 and up)