>>112405
>I got no creativity.
>My head feels under pressure and games and internet are constantly on my mind
These two statements are at odds with one another. It's the same part of your mind at work in both cases. The only problem you have is that you're used to using your creative mind to appreciate other people's creativity, rather than your own.
Release yourself from the need to succeed, on the first try or at all. Recognize that you are but one moment along a continual path through all lives. What you learn in this life will be used in the next, so there is no true "failure". Just some mistakes that you learn from sooner, and some that you learn from later.
You are a smaller part of a larger "soul group", united in death but separated in life. There may be people you are drawn to in life who you recognize an unconscious affinity for, these are members of your soul group that you are separated from (another "hand" of the same "body", if that helps make sense of it).
Nobody is at the same stage in their journey as you are, which is why the only person in your way is as >>112398 said, yourself. Don't expect to succeed overnight, it's a gradual process. You will live every version of every day before this is all over, so focus on the small changes as every day repeats. Find one small thing that bothers you and is in your power to change: Make your bed in the morning, or spend two minutes sitting in a chair with your own thoughts.
You probably heard in school that your brain is a muscle, you use it or lose it, and that is true for every part of your brain. It's not that you're not creative, it's that your mental muscles have atrophied from lack of use.
Nobody starts out benching 300 pounds, and most experienced trainers will tell you to focus on your form before you try to focus on your gains. The same applies to your mind. Read a book, even if it's a short piece of light fiction. Don't "tear a tendon" trying to force yourself to read Ulysses, just pick something that interests you. Once you have the habit formed, then focus on modifying it to suit you better.
And remember that failure is okay. Yes, jerking off is (generally speaking) bad for you, yes, porn and video games are terrible for you. But if you can go from watching porn 3x a day to 1x a day, that's an improvement. If you can resist jerking off for 3 days, focus on the success compared to your past, not on how you failed after "only" three days… It's three more than you did last week. Don't dwell on the two weeks you went without cleaning your room. Focus on the feeling of pride after you did, and crave that feeling more often, just like you crave bad habits now.
Cold turkey rarely works. As you taper off from video games, you'll naturally feel drawn towards other activities. Until that time, don't waste all of your willpower trying to "not play video games", because then you're fighting a battle every time you're not. Instead, say "I'll play a round after I've done laundry", for example, so that when you sit down to do it, it's guilt free enjoyment. If you truly want these changes to happen, they will happen, there's no need to rush them.