That's exactly what I'm doing this semester. The max 20 hours:
Chemistry (Survey of Inorganic/Organic/Biochem)
Guitar (believe it or not, it's one of my hardest classes!!! :uhoh21: )
I'm managing. At this point, about two or three weeks of class, and I still have A's (my sanity? that's another story!
). I even get around to volunteering and tutoring. I have taken a leave of absence from my part-time job until break.
I think it's a matter of knowing how you study and managing your time. I don't know if you have a hubby and/or kids, or if your social life is that important, but you just have to think ahead.
Sorry, running to anatomy lab. If you need anything, feel free to email me.