Ten Million Ways to Survive in a Dungeon

Yang Jia, after being reborn, thought he'd follow the typical novel trope and rise to the peak of life. Instead, his parents dumped him into a monster-infested dungeon. It's filled with ferocious monsters, a brutal survival-of-the-fittest environment, and the useless fact that he went to college. So, can someone explain the 'went to college' joke? Also, that guy from the neighboring novel who reincarnated as a dragon, since we share an author, can you give a newbie some help? Dungeon Survival Series Part 2, the official sequel.