Are you asking a question? Or answering it?
I am not sure.
In any event
I think they stated in the film that he went to school part-time at night while he worked full-time during the day at an auto mechanic shop.
Or something to that effect.
No?
So, in other words, he didn't just plow straight through his schooling.
It took him much longer than most others.
I am sure that was part of the comedy in the back-story.
That it took forever for him to graduate school.