How do you balance time for your course and work?

Cry a lot hahahah I used to be a deployment consultant for large scale implementations for workday, and had a startup at the same time. I always break things up into chunks. 60 mins 30 mins, 90 mins. This way I put together all the common or similar tasks together in those time chunks, and then take 15 min break 4x a day, and then a larger break towards 5pm....After that break i start on the new waves of tasks, and in your case after 6pm I would work on courses or other.