Id say start out simple , and then as your character develops go more deeper into developing the biography , the most important parts of a biography would be the pictogram, name and gender , and then you have some more sections like : likes / dislikes , friends/enemies and etc. Some people like to put "themes" of their deeries , others put a song that fits their mood or w/e.
....Basically its a huge and long process , ive erased my biography so many times because it never looked the way i liked it , so if it takes a long time dont get frustrated cause when you lay it out the way you want it to look , you'll be amazed to see how your character has developed.

yeah, correct.