How long does it take to complete sophia courses?

[MidLifeCrisis]

I've got 60 odd credits with Sophia, including all those you listed and did it in 2 months. All the ones you listed aren't too hard or touchstone heavy so you'll be fine. That said I'm not after the knowledge as such and hence just went straight to challenges.

With the challenges you get 3 tries on each question, I have the unit pdf open and only reference it on the third question if I can't pick it before hand. I do the same with the milestones but with every question.

My tip with Sophia is to just start, if you spend a couple days working out the most efficient/debating then you'll be behind compared to if you just start.