Yes, I've done all my prereqs online except one. And I've seen threads on this before here, so I know everyone will tell you the same thing . . . self discipline, self discipline, self discipline! DO NOT get behind! You will be sorry if you do
! It sounds like you have a plan (scheduling time for schoolwork). The classes themselves usually have a schedule set up for you. Just stick to that and you'll be fine. After taking my one in person class, I really love the online classes for their flexibility (and yes, working in my pjs!) but it is harder to stay on track. I take the exams when the schedule says to, ready or not. I've gotten behind before because I didn't feel like I was "ready" for an exam, and that just gives me LESS time to study for the next exam . . . it's a downward spiral.
Only one class have I had to log in at certain times. Generally that's not the case.
The testing depends on the school. My dh took online classes, and their tests were done from home, open book and timed. At my school, I go to the testing center at the college to take them - at my convenience (but of course only when they're open!)
Good luck, I hope you enjoy online learning!