Opportunity Cost In College

What is the opportunity cost for me in taking this course?
First, what is opportunity cost? To me it is merely a decision amongst two likely possibilities where you judge the benefits of one choice over the other. You can simply choose to do this or you can simply choose to do that. If someone goes to work straight out of high school it may be financially better for them short term, however, they may not receive the same amount of income had they went to college. Undeniably, a college degree will cost a small fortune up front nonetheless if it leads to a better paying job, then the cost would have been worth it. You also have to ponder and consider the time and energy spent at their job. Obviously, a well-paying job might hamper the quality