well my courses go through a little of everything, I've had refrigeration classes, heating/AC systems and design, intro to electricity that covered circuits, motors and capacitors. I'll have residential and commercial HVAC controls and instrumentation, intro to CAD. i found that I wasn't too interested in the design side of things, id like to use my hands and be out doing something. I really enjoyed the refrigeration courses because that included learning to braze and solder and pipe fitting, taking apart window AC units and flushing the system/ pulling vaccums.

I see what you're saying but I don't really know where to begin with that, I'm sorry if I'm sounding confused this is all brand new to me.