Hi,
Good for you!!!
I also moved out when I was 18. I just happened to live with a single mother JW who was terrified I would end up poor, pregnant and going door to door--and married at 18. She encouraged my education over the elders objections. I got to go to college. I got grants, loans and worked to pay my way through. It was worth it. A whole world is out there waiting for you to discover it.
I was never disfellowshipped (at least that I know of) however, everyone in my immediate family was. My father for smoking, my older sister for fornication and my mother for fornication. My mother appealed and got her "conviction" overturned by the governing body. She only did it once. ;)
Anyway, if it is any consulation, you will make it. I did. I went to college and learned about other people and religions. Do you really think that God is going to only save people who call themselves JW's? What about Mother Theresa? All she did was help people. How can that be evil? You need to sit and logically think about things like that. What about women's rights? Do you see a similarity between Afganistan and the JW's? No education, should not work, etc.
You are important and have your whole life ahead of you. Try not to let the shunning and negativity worry you. Do you really want people like them for friends? They judge without facts. They rip families apart by demanding that non-believers have little contact. How healthy can this be? It is not. Bottom line. They are a mind controlling cult.
Please do not give up. It will be hard. Please keep in touch and let us know how you are doing.