The Keeping Up With The Kardashians star told US Vogue she has started a four-year apprenticeship with a law firm and plans to take her exams in 2022.
She said she had already scored 100 in one criminal law test, saying it was "super easy" and that she could do the subject "in my sleep".
In 2001 comedy Legally Blonde, Reese Witherspoon's character Elle Woods transforms from sorority queen to a murder-solving legal star.
The new career direction for Kardashian West comes after she played a role in the release of prisoner Alice Marie Johnson, who was jailed over a non-violent drug charge in Alabama in 1996.
After visiting Donald Trump at the White House to argue the 63-year-old grandmother's case, the US president eventually granted clemency.
The reality TV star was also among celebrities who pleaded for the release of teenage sex trafficking victim Cyntoia Brown, who was jailed for life after killing a man who tried to rape her in 2004.
Now 30, Brown is due to be released in August.
Speaking to Vogue about her decision to pursue a career in law, Kardashian West, 38, said: "I had to think long and hard about this.
"The White House called me to advise to help change the system of clemency and I'm sitting in the Roosevelt Room with, like, a judge who had sentenced criminals and a lot of really powerful people and I just sat there, like, 'Oh, sh*t. I need to know more'.
"I would say what I had to say, about the human side and why this is so unfair.
"But I had attorneys with me who could back that up with all the facts of the case. It's never one person who gets things done; it's always a collective of people, and I've always known my role, but I just felt like I wanted to be able to fight for people who have paid their dues to society.
"I just felt like the system could be so different, and I wanted to fight to fix it, and if I knew more, I could do more."
Kardashian West's late father was Robert Kardashian, who was a member of OJ Simpson's defence team.
"My dad had a library, and when you pushed on this wall there was this whole hidden closet room, with all of his OJ evidence books," Kardashian West said. "On weekends I would always snoop and look through. I was really nosy about the forensics."
The reality TV star is being mentored by two lawyers who are helping her log her required 18 hours of weekly supervised study.
Kardashian West is currently getting ready to welcome her fourth child with husband Kanye West, via a surrogate.
In the summer she will take what is known as the "baby bar", administered by the state of California, and if she passes she will be allowed to continue for three more years of study.
"First year of law school, you have to cover three subjects: criminal law, torts, and contracts," she said.
"To me, torts is the most confusing, contracts the most boring, and crim law I can do in my sleep.
"Took my first test, I got a 100. Super easy for me.
"The reading is what really gets me. It's so time-consuming. The concepts I grasp in two seconds."
Plenty of further questions, your honour.
© Sky News 2019