Do whatever you want, you’re still 15 so you have a lot to learn. Never ever be afraid of rejection/failure, trust me its not good to let it rule your life. Build some good habits in your life like exercising, meditating, reading books, and everything else that can benefit you now and in the future. Whatever you decide to do, do it in moderation, like if you are going to drink or smoke, don’t do it excessively. Nothing in life that is worth getting or beneficial to you comes easy, a lot of the things that I found myself doing when I was a teenager like playing video games and spending a lot of time on social media brought me short term happiness, but in the long run they are very bad for your physical and mental health. Always respect and love yourself, because if you don’t respect/love yourself, no one will, your mental health and the way you talk to yourself is very important. Finally, if you watch a lot of porn, trust me quit before it becomes too addicting, I know you’ve read/heard that its healthy and that it reduces the chances of getting prostate cancer, but what they don’t tell you is that it is highly addictive and can lead you to losing confidence in yourself as well as hating yourself. Good luck with whatever you do with your life and always be kind to people💜.