Not sure what you mean by "repurpose meaning" in your career but if you are asking how do you get ahead / promoted then I think the answer is probably not going to happen at your current company. You probably have to interview for the position you really want at other companies. Its easier to start at a manager / senior level at a new company. Grad school is probably not going to get you the promotion
You need to be able to interview really well. That's really it. I am an ok engineer. Not a rockstar by any stretch of the imagination. In fact I really don't like tech at all. I just like the pay. One thing that I can do is interview really well. I have had probably 25 - 30 interviews over my career and I have gotten an offer in every one. Its relatively straight forward to do (not easy). Make sure you look presentable which means getting in physical shape. Dress well. Speak with confidence. Act like you belong there and that you are who they want. Act like you already earned the job. Be confident but not cocky. People want to work with someone they could see hanging out with. Make sure you ask a few questions but nothing crazy. Make sure you maintain that confidence once you get the job. Just look at the whole thing as a game.
I have never had a leet code style interview so your mileage may vary. The effort required to pass a skills based test is not worth it to me. I am currently a tech lead at a fortune 500 company making more money than I would have dreamed (I grew up very poor); probably not as much as I would make at a FAANG but again I have no interest in investing the effort required to prep for a whiteboard coding style interview. I'll probably shoot for a director position somewhere else in a couple years.
If you are asking how do you learn to love your job like the people on HN who eat, breath and sleep software? No idea, I don't like it. Its just a job. I use it to pay for things I am passionate about. Learn to love yourself first, everything else will follow. Get in shape if you aren't already. The answer is not in grad school.