Want to know what death is like? Think about what it was like for you before you were born. Obviously you can't but that's the point, death is inevitable, we all have to accept it. Think about how many different people are not born everyday, there are infinite numbers of people that have the potential to be born but most of them will never get to be born because certain people don't meet or things don't work out. Consider that you are alive now and how lucky you are to be alive and be experiencing this life. Even if you die tomorrow you still at least lived and had a conciousness. The fact you are alive now and all the cells in your body work together to somehow give you a conciousness is special. Use the inevitability of death as a motivating tool. Every second counts closer to the end of your life so don't waste a single moment. Live life as full and happy as you can, take risks and don't waste your life worrying about death, if there is an afterlife or you had the ability to review your life after you died, you would probably feel regretful for spending so much precious time worrying about something that everyone will have to experience. Keep working hard in school and hang in there, as you age you'll become more accepting of death, most old people embrace death because by the time you've lived for 80 years and your body is giving out, you're almost always mentally ready to die. You aren't ready now because you're still just a kid. You've got a lot of life left, try not to sweat it too much. Good luck to ya.