Hi M.,
When I was (much) younger, my mom went back to school to complete her Bachelor's of Science degree, and she actually hired a teenager to come with us to the University of Washington evenings when she had classes. The girl that was hired would just sit with me in the library, and after homework, we'd watch movie or play games. Since then, my mom has been able to get into the career field she loves-clinical research. She still raised me the right way, and was able to reach her goals simultaneously. Go for it; there's no better way to help others (especially your child) learn to set and reach goals than by example.
Also, although I don't yet have any children of my own, I do work full time and completed my AA via evening and online classes at Bellevue Community College (BCC). Lots of the community colleges around Puget Sound have good programs that can be completed online, just do some searching online (Shoreline CC, Green River CC, Lake Washington Technical College, etc.)
Good luck-let us know how it turns out!
E.