What should i do when i dont know whats my goal, purpose of my life

Im not saying im suicidal, or anything else mental issues, but I dont know what to do. I just feel empty and dont know what should i do. Everything i try, that dosent really interest me or match me. I tried every advice my homeroom teach told me to, i just dont see any future of my self doing nor living with something.

And ill mention it again, its nothing mental problem, just something empty.