She was discouraged by teachers to apply to uni, stating that she shouldn't set her sights too high.
In Princeton, she ran a day care centre and after-school tutored. At Harvard, she worked for a legal aid team. She faced a lot of prejudice in Princeton including the parents of her roommate requesting their daughter be moved.
She mentored Barack.
She was on the school board for her kids' school and campaigned for diversity.
She was also a mayor assistant and went on to be executive director for a none profit organisation encouraging young people where she set fundraising records, that couldn't be matched for years after she left.
After that, she went onto create a community service centre for a uni, before moving to a community hospital job. When campaigning started she was working there. Oh, and she earned more than he did by around 100k.
As first lady she visited homeless shelters and food banks. Held things for woman's rights and actively support equal pay for woman. She advocated on behalf of military families which she made her personal mission. She was one of the few people in the administration to do something about obesity. She campaigned for Nigerian school girls who had been kidnapped. She put a veg garden in the Whitehouse, and this was used to feed the family and visitors. She was active with LGBT rights. She visited many schools in the USA, Mexico, Africa, China and UK where students said she was relatable, I heard one of her London school speeches and she was amazing (stayed longer than she was supposed to and re-arranged a meeting). Let's not forget the Saudi visit where she refused to wear a headdress. In Qatar, she joined let girls learn.
She won't run for the presidency because she wants to help as many as possible without bias.
Oh and it's two books she wrote.
Just a few of the things she did even before she married some president. Even now she is still actively campaigning for improvements.