How to become a professor?

I've got a buddy who is a part time professor for two universities. He seems to live pretty comfortably. If anybody on here has become a professor, what would you reccomend for someone who would want to transition to that profession?

For reference, I'm K-12 certified in English Education. Worked in education for about three years. And I'm halfway to earning my masters for reading comprehension.

What would be reccomend to teach young adults and adults instead of public school kids?

Also, what would be some of the drawbacks if I decide to transition to somthing like my friend has?