Would it work if I decide to attend a summer course and work at the same time. Its an ECON course, I want to complete it in Term 1. However, i'm not sure if it would be too much trouble managing both?
For those working & studying at the same time, how do u handle both ?

It's not too much trouble.

Econ runs for half the summer. That's two months, twice a week, for 2-3 hours at a time. It's day time course.

What you would do is tell your manager that you've enrolled in summer school and for those two months, your availability on the days you have class will be different. Arrange to get hours that run from the time you would get home from class. Or ask for those days off altogether.

I did work, summer school, volunteering, and running the house basically all summer long. I think you'll be just fine

Easily done. 2 Classes a week (probably at night). Manageable