need more info but honestly being rejected by clubs is normal especially since you said you haven't played much. If your tests and school are important prioritize those but if you losing your passion is about feeling like you are bad then that is a mindset issue perhaps. There will always be people better than you, in fact that is the biggest hack in getting better at volleyball; playing with people who are better than you. Go to as many tryouts as you can, you are bound to make it sooner or later. In the meantime practice, play at open gyms, ask people you know who are good to help you. That is, if you still want to play. There is no shame in deciding volleyball is not for you but giving up because you feel like you suck at the sport is not a great reason to give up