Volunteering/Internship Gap Year?

Hello! Currently I am a biology major and sophomore in undergraduate. After I graduate, I plan on becoming a Wildlife Biologist/Rehabilitator, but I am deeply unhappy with my college life. I am stressed, depressed, angry, frustrated, anxious, and confused about everything all at the same time. I can barely find the motivation to pass my classes and I feel as if I am in a downward and endless spiral of unhappiness. To change this, I want to take a break from school and just travel and participate in wildlife conservation opportunities! I plan on volunteering and taking this gap year approximately from August 2018 to April 2019 which will be after I get my AA this summer term. During this gap year, I would like to become more knowledgeable about my world, become more humble, learn, and experience. Please write below your opinions, experiences, suggestions on what programs are best for a gap year in wildlife conservation, and everything else in between. And yes, I do feel like this all of the time, every single second of every single day. To pay for my gap year, should I have to after speaking with financial aid, I was going to start saving for it starting January of next year up until August. I have no plans at all to drop out especially since I am already halfway done with my degree. After the gap year is over, I will return to school and finish no matter how I feel.