Need help dealing with stress

Hello everyone! Hope you all are doing well! This is my first post here, so please excuse me if I didn't follow any rulesI'll structure what I want to say in points so it's easier to read

1. I am a 21 year Male student currently preparing for competitive exams(GATE, in my case)
2. I have trouble managing my stress levels, which led me to a downward loop of watching porn to cope.(Stress and need to watch more porn kept increasing).
3. I used to learn how to play guitar, which used to help a lot. But with the prep, I had to give it up.
4. But the way I am now, I am scared I might get any proper work done.

Any suggestions/ questions/ criticisms are much appreciated, thanks in advance! Ps: Let me know if this is the wrong sub for this as well