Sometimes you have to do the wrong thing and learn the hard way. Anyone can tell you to do your assignments, but until you fail the course and have to do it again the consequences might not seem real. Then you will really be kicking yourself for wasting even more time.
Yes it is worth it. The return on gameplay hours for the cost of a game can be incredibly high.
I recommend you start by downloading Steam on a laptop or PC and browse some games, or try some demos. Some games require mouse and keyboard, while others are better with a controller - my preference is a regular Xbox controller, it’s plug and play.