Are there any specific spreads that can give me some insight into the suitability of different courses and how they would relate with my job prospects in future? I would appreciate any help
Look at the index http://www.tarotforum.net/showthread.php?t=31867 there are some spreads for choices & decision making listed. Those might help you with choosing your major then your classes.
You can also use spreads that bring to light your likes or certain talents you have that may work well with certain majors and career choices. Or you can use a really big dart board....
I posted the Too Many Choices spread last year. I like it because it includes a column for the choice that you haven't thought about. So in your case if you're trying to choose between 3 Majors, you'd lay out cards for each of those choices and an additional column for the Major you haven't thought of yet.