The link above will take you to the NYC PDF file of the subway system. Bushwick is an interesting area currently experiencing quite a bit of renovation. If you drive, my suggestion would be to explore the neighborhood during the morning, afternoon and evening to see the ebb and flow of the neighborhood during different days of the week. If you like the neighborhood, there are homes here on Trulia listed with the agents who write in the forum. You may want to contact a few of us to take a peek at a property or two if you feel it is a place you may want to live/ invest in.
P.S. The L, A and J trains have stops near multifamily homes that are available.