I'm a Sophomore in highschool taking all college classes, I don't really regret it, but the homework just comes in loads. I usually do my homework as soon as I get home (even on the car ride home at times), I also have Academic Decathalon (it's a thing where you compete with other schools in, well, academics lol), so I stay after school for another hour for that. Homework doesn't really take long, it's a lot, but I pay attention in class, you just can't get me away from the teacher's words or the board in class, but afterwards I study the work as much as possible so that it doesn't slip my mind. So my basic schedule (not including this week since Winter Break is coming up and the teachers are lightening the load, it's still a lot, just not as much) is:
Arrive home at 3:40
Start homework at 3:45
Finish homework (usually) at 6:45-7:00
Take a 30 minute break
Study from 7:30-10:00
I have school in about an hour and a half right now XD, I didn't have much this weekend, so I finished it all on my Friday afternoon, so I stayed up late today.