We are originally Buddhas, which means that the most fundamental essence of our lives is the same as that of Buddhas, not that you are Buddhas now. Say that you are originally a Buddha, and the Buddha is reincarnated and is not affected by the afterlife. Is it okay? Don't say that you have become a Buddha. If you look at the Buddha and see that the five aggregates are empty, can you do it again? I can't! So what's your relationship with becoming a Buddha?
Buddhism is different from other religions, and it needs good rational thinking and reading a lot of classic history to understand Buddha's enlightenment. Otherwise, it is better to believe in Christianity than to believe in some confusing Jaken heresies, such as the first class.