How do I do this

I've been living with my mother, brother and her new husband for 2ish years, everything has come to a point where I want to leave but can't because financial, credentials (got new id coming). This being trapped has effected my life for the worst I cant walk or hitchhike because the nearest town is over 100 miles. (Yes posted before) I know GoFundMe is a thing but I ain't got no one to actually donate yes I'm now looking at Job corps but I don't know how they go about stuff.