Photography? Tips tricks help in general

Is there anyone on here that does photography for a living? And if so how did you start that? Are you with any companies? Also i would like to see some of your work as inspiration. I am currently accepted in to the college of my choice but I can't help but think about a different major. I plan to go to vet school but photography has been such a part of my life. Do you have any times for an aspiring artist?