Ok, how many instructional hours will that entail?
Typically 1 class-hour every week per credit. however, I have taken 1-credit courses that entailed 4 hours of lectures/lab-work (every week — what assholes), and my lab courses were 2-3 credits involving
at least 5 hours of lab work a week.
This will vary depending on where you study, of course. And, needless to say, this is just the time you'll be spending in class; there's also the time you'll be studying and/or writing reports and so on. (You are also free to skip lessons, as usual

so long as you know what you want...)