You're not the only one. I think most of the kids are not interested in what they are teaching in schools, except maybe for a couple of subject. History is not easy and I think you have to have a certain age, reach some kind of mental and emotional maturity to be interested in the subject.

As about life after death, that's a question of belief I think as we don't have any proof that happening. I'd say live your life now and don't stress yourself about things you don't have control of.