It will be more work than you anticipate in the sense that you have to prepare for the class. So if you are expected to teach one hour of lecture and two hours of lab, it's not three hours of work; it's a full week because you have to prepare to fill three hours with meaningful material for the students. One thing that's JC does well is prepare their adjuncts to use the classroom technology by requiring you to attend orientation training sessions. They've made considerable investments in creating a professional learning environment for students and they expect you to be able to take full advantage of it. They will have example syllabi for your class and they do offer many training sessions for you to learn how to become an effective instructor.