I would not be able to sustain more than a single academic course while working a 9-6 onsite IT job. I was able to keep up with an upper division undergraduate

I would not be able to sustain more than a single academic course while working a 9-6 onsite IT job. I was able to keep up with an upper division undergraduate Maths class on a 30 hour per week IT job. The course was very challenging for me but quite rewarding. Homework took at least ten hours per week. In general, less energy during seasons of less sunlight is not at all unusual.