I want to become a nun/sister and I need help!?

I have been looking into becoming a nun/sister. I am a 15 year old Catholic. I am trying to find out many things. How do you start the process? What are all the communities? Is there a community that works with animals? I would like to start or work with a youth group after I take my vows, what community would be best for this? Should I go to college after high school? My priest is changing parishes and we don't have a vocation director or spiritual guide or anything so i don't know who to talk to.