Welcome Katey, I am Jan and I am an addict, gaming-addict to be specific. I also am 17, which is a very young age for someone to be in recovery. That’s why most people on here are “old”(no offense 
) It usually takes people a lot of more life ruining before they want to better their life. Because we quit so early we have our whole life in front of us.
I am proud of you for deciding to better your life, because it’s a big and hard step.
I highly recommend checking in daily to keep focus in the checking daily to maintain focus thread.
I also recommend finding some activities to fill time like, running, cycling, working out, meditation/mindfulness, crafts, drawing, reading etc.
I also recommend reading on this forum a lot on this forum and asking questions if you have any.
Do you want to know a secret to maintaining sobriety? If I think about not gaming for the rest of my life, it scares and I feel like giving up. If I think about not gaming for today. I can do that. I can also do that the next day. that way I can just rack up days without the thought of not using being a huge burden.
Don’t listen to your mind, your mind will not stop being a dick, it will be a dick less and less, but it will never fully stop being a dick.
Do you have cravings? Talk about it, that way you dont have to carry the burden on your own, and you will get distracted from them. Also play the tape. This means imagining using, and foreseeing what will happen. Will life be joyous and great, or will you be full of shame and self disgust becuase you relapsed.
When your mind tells you that you can use once, that’s bullshit, the biggest bullshit ever. Your addiction just tries to find a way to get satisfied.
I also recommend following the twelve step-program with a sponsor.
I hope this helps
Good luck, you’ve got this. 