Research the video game industry and what its mostly comprised of. There are plenty of different careers but mainly for making games chances are tu want to aim at becoming a video game designer. Understand what exactly video game designers do on a daily basis. What are some challenges they may face, what skills are necessary, etc. What exactly do tu want to do when tu become a video game designer? Yes, tu want to diseño games, but what kind of games? What sort of audience do tu want to aim for? Who will tu work with (because believe me, video game designers work in pairs o groups; the workload of doing it alone is close to impossible unless you're trying to become an indie game designer) and how are tu going to get your game out to the public? I would also gain an understanding of the history of video games in general. I recommend lectura Rules of Play: Game diseño Fundamentals. It is essentially the best textbook revolving around video game diseño that I know personally. Keep up with what's going on in the gaming industry. If tu want to diseño games, look at what's been done before. There are tons of games out there that are all successful in their own way; distinguish them from one another and figure out what makes this enjoyable for someone and what tu may o may not like about it.
also tu have no idea how excited I was when i saw this pregunta i was like "my time to shine"
Look for a Digital Design, o other Creative Tech uni course paper.
I'm currently studying Digital diseño at uni and game development is part of it.
I will say though, do your research before-hand. Many people out there go "I wanna make games for a living!" but then tu actually study it.....and many are put off like myself. If tu want to do it, cool, but be prepared that it's not as fun as people would think it would be. It's extremely frustrating and tedious work, but the result makes it worth it, so good luck.