How to survive until I can move out?

Here's my situation. I love my family very much but I am about ready to get out on my own. I am 18 and know a nice, not too expensive place I could live really close to the community college. My problem is that I don't yet have a job. I would love to work at a Petsmart, and there is also one close to the location I would move to, and I have applied to one location about a month ago and never heard back. I am thinking of re-applying to both locations. I have no references and no prior job experience but do feel I am very qualified to work there because I have several pets, helped to take care of a relatives petting zoo and area, among other things. I did list these qualifications in my resume that I sent with the application.

Anyway, I am in a difficult part of my life because I am trying to grow as a person and trying to accomplish many goals, including getting my GED and deciding what I want to do with my life, weather I want to go the beauty school or move out and I am already planning on doing more college down the road once I have decided what I want to go for. I am also trying to get healthier and all of these thing are difficult to do from home because I feel like my family holds me back a lot, they don't try to I just do so much better on my own. I know this because I did live with a cousin for a few months away from my family and I had fun, lost A lot of weight, and did very well. I feel like I am having a difficult time getting my life started partly because I am still living with my parents and 14 year old little brother.

Any tips, advice, ideas on how I can get started, things I can do in the mean time, how I can get the job I want or just a job, and ways to survive until I can get started and out on my own would be greatly appreciated.

Thanks in advance!