How about looking for an Industrial Design firm with job openings for computer science or software developer? Not a career change but at least you can be involved in the product development process and get a first hand look into industrial design.
I think your plan of taking foundation classes at CSULB or Art Center (at Night) is a good plan. At the end of the day, your portfolio is what gets you hired. The advantage of going through the whole degree is the exposure to different teachers, mentors, students, projects, etc.