Please rethink your goals and how you will have impact. Unless you run a non-profit, people are in the business to make money. Let me tell you that I had the reverse experience earlier in my adulthood. I described a bit in a thread recently: https://news.ycombinator.com/item?id=41598911
In my late teens and early 20s, I rejected big corps. I rejected standard job search and interview practices because people seemed fake. I wanted to stay away from making products that can do bad things (very broad!). I stayed away from business-y courses and topics because people with money seemed greedy. Fortunately, I found a workplace that satisfied my beliefs. I made an intern's salary in the area as a full time employee. Salary increase was almost non-existent. Work was very chill. I lived paycheque to paycheque and never travelled, but being poor was ok being in my 20s.
The last straw came when the company was sold. The early employees had a windfall. Some folks, who were in their 40s, retired or became an angel investor. Some kept their job and bought "adult toys" (Example: Classic cars). I got $0 because I had no stock. I turned 30. I had no money to replace even my personal computer and bought old parts to keep my computer going. That's my wake-up call.
I began to network and learned the reality of the industry. I learned to interview for jobs. I learned that a degree wasn't as valuable as my parents said in the 1980s. The company I ended with had some controversies, but there were a lot of smart folks who were eager to learn. There was no lacking of recruiters reaching out when and after working there. Start saving money in my 30s still wasn't too late!
If I had a sizable trust fund and just needed something to occupy my mind during the day, the non-evil-corp would be perfect.