Hey, dude, you're old enough to play games for adults. I was like you, dabbled in games on Facebook, but my advice to you, go to something more serious. Here is the reference for you, where you can play seriously
https://www.vegasslot.co/ . Do not be afraid, there you can play for free and see how the casino games actually work, but then, when you will learn to play, you can play for money. For example 2 years ago I was not a professional, but thanks to that site I've learned to play well and "pumped" my brains, now I even think differently