OP,
Try and borrow of one of the course texts from a library.
Read a bit , keep it at home with no pressure, and see if you go back to it out of interest or if it starts to feel like a bit of a chore to finnish it.
Remember that a degree will take up a lot of your time in the evenings and weekends, especially doing it part time whilst working, for at least three years.
You need to be getting something out of it, at the time of doing it, more importantly than the qualification itself at the end.
You may find that putting your work-life experiences into context with modern business theories really helps to clarify ideas in your mind, and becomes very interesting. On the other hand, you may feel that you’re not learning anything new, just completing assignments to get the grades you need.
You’ll find your motivation stays stronger if the course genuinely interests you, if not it’ll be hard work (even if not challenging).