There's a web site where different people share what they think of each course, and how many hours they devote per week: https://www.omscentral.com/

That might help you decide whether it's doable.

My first (and only) course was somewhere in the middle in terms of effort, and the courses I was most interested would have required another 50% on top, which wasn't going to work for me, between work, parenting, other learning etc.