Speaking at an event to promote Becoming, the memoir that has become the fastest-selling book of 2018 with three million copies sold, the former First Lady claimed, in reference to the Trump administration, "change is not a straight line".
Michelle Obama's memoir chronicles her life growing up on Chicago's South Side through her years inside the White House as a mother of two and the nation's first African-American first lady.
"I had all this protocol buzzing in my head and I was like "don't trip down the stairs and don't touch anybody, whatever you do" and so the Queen says "just get in, sit wherever" and she's telling you one thing and you're remembering protocol and she says "Oh it's all rubbish, just get in", Michelle Obama said.
She said: "So my biggest piece of advice would be to take some time and don't be in a hurry to do anything".
Michelle Obama criticised Facebook COO Sheryl Sandberg's "lean in" strategy as insufficient for women trying to excel in their careers.
"I love it. She can say whatever she wants now".
She also returned to a London school she had visited as U.S. first lady encouraging students to "practice sisterhood" as she presented a new memoir of her life.
But Obama graduated from the select Ivy League university and went on to Harvard Law School before joining a Chicago law firm where she met her future husband and then USA president Barack Obama.
The former first lady said before Obama, then a USA senator from IL, announced his plans to run she thought she would play the supportive wife and console her husband when he lost.
Obama quickly cut herself off and apologized to the room for getting too comfortable onstage. Although the girls spent their teenage years in the White House, Michelle points out that they still faced numerous same experiences she did growing up.
During her husband Barack Obama's time in office, Michelle pioneered a number of initiatives during her eight years in the White House, with a special focus on children's nutrition and health. All right, I'm back now.
"I was told: "I don't think you are Princeton material".
Obama added, "I'd walk away from those events so hopeful".
She married into the royal family, which caused a media frenzy, and she also announced her pregnancy.
She said the idea that women could have it all at the same time was "a lie".
"The best advice I can give here is the simplest: I think everyone just has to be themselves", she said. "I felt EVERY word of that sentence", another Twitter user wrote. "Kids are an interrupter; they mess it all up".