The answer is in the Word of God!
Hebrews 11:3, Through faith we understand that the worlds were framed by the word of God, so that things which are seen were not made of things which do appear.
If you have any real questions about life, you can find the answers in the Bible. You don’t have to walk around wondering where we came from or what happens to us after we die. Just as those that say man came from monkeys take it by faith, so must we that believe in God, His Holy Spirit, His Son, and His Word must have faith. To have saving faith we must believe the Truth of Jesus’ death, burial, and resurrection.
Friend, you can have the answers for why you believe, what you believe. You find them in the Word of God! Get to digging and find real answers for the real questions you have!