Look into 2nd degree acellerated BSN programs. These are geared toward people like yourself with a BS or BA in a non-health field. I know in the Bay area Samuel Merritt has an excellent program and I'm sure there are others.
Another option is to get an ADN from a community college. With this you can take the NCLEX and become an RN. From there you can continue on with a bridge program RN-BSN. There are a variety of these available often designed for fulltime working RN's.
While it is important to investigate nursing schools. It is even more important to get started on prerequisites. Most programs require Anatomy, Physiology, and Microbiology at a minimum. Get enrolled at your local CC and get registered so you can start taking these classes at least. In addition to the above classes, each school may require other courses. Some more common ones are Chemistry, statistics, communication, psychology, sociology, etc.
Good Luck in your pursuit!