I like to think of myself as a computer repair technician because I've fixed some of the issues with my computer.
Oh that must be very helpful. What does a computer technician actually do though?
Well, it's actually a pretty broad job description but they repair and maintain computers and servers.
I see, nowadays computers mostly come in the form of laptops and tablets don't they?
Yes, most computer technicians prefer fixing laptops over tablets though. I'm assuming because laptops have a common comuter configuration that they are used to like the power supply, motherboard, etc.
That makes sense, though I am not familiar with terms like motherboard. What is a motherboard? 
A motherboard aka the mainboard is the main printed circuit board (PCB) found in general purpose computers.
So its like the heart of the entire computer, is that right?