Kris Jenner says the end of her first marriage made her realize how little she knew about managing finances.Angela Weiss / AFPKris Jenner says her divorce from Robert Kardashian Sr. forced her to learn how to manage money.She said she paid little attention to household bills during their marriage because her ex-husband handled them.Becoming single again pushed Jenner to be more financially literate while supporting herself and her kids.Kris Jenn…