16 Credit hours shouldn't be a problem at all. Honestly, college classes weren't any harder than high school ones for me, and there tends to be less homework, because they don't make you turn anything in. Unless you're taking an upper-level calculus or something, your freshman classes should be easy. As in, I can't remember a class I did more than 8 hours of homework for total, all year easy. I'd say overload early on so you have more spare time your upperclassman years. This semester (first semester of sr year) I'm taking 16 hrs, but only three days of the week so I have time to work almost full time. I'd much rather do this than be bored! (and working that much means I can afford to go to disney between semesters! but that's a tangent). Next semester I'll probably only have to take 12 credit hours, but thats because I did as much as I could early on.