A career in game development is actually quite the challenge. You may be able to find some type of entry level job or internship, but there will be a lot of competition for those jobs. A lot of people want to become game developers. So the real key to success is creating a portfolio of smaller projects that demonstrate your skills. You’ll need to demonstrate by example that you understand how to design and build a game and, most importantly, FINISH a project. The devil is in the details.
After you make it through a course or two, you may have some ideas and what type of game to build for your own project. That game needs to be good enough that someone will want to play it for several hours. At some point you’ll want to stop taking courses and focus on your portfolio.
My best advice is to build something much bigger and more refined than what the courses will show you. But don’t try to build something so big you’ll never get it done. A great game doesn’t have to be huge.
Once you have something good enough to show that you are capable of building, and FINISHING, a project, then employers will take you more seriously. Imagine having a game refined enough that you can actually put it on the app store, Steam, or at least web based. The goal should be that the game is fun to play for hours. The games in the courses are only good for a couple minutes of play.
Then get all that on github and you’ll be ready to show off your skills.