How do I know it's true?

I don’t believe that what Christianity professes is true, not just Christianity but any religion that make an unproven claim. What do I mean by true? True is something that is a provable or proven fact. Christianity is a faith or is based on faith, it is something that you have to accept on the word of another, but I have a difficult time just blindly accepting someone’s opinion that don’t have any provable evidence to back up it’s claim. How can we prove the tenets of Christianity’s claim? How can I prove that Jesus is sitting at the right hand of his father? As I type this it is almost laughable that people actually believe this, that is, that a god impregnated a virgin in a village in what was a Roman providence in the so-called middle east area that is now called Israel, this semi-divine being walked on earth, did miracles, knew he was going to be killed and he was going to rise three days later, and if you believe this you will be saved from the punishment this semi-divine being‘s father has created for people who don‘t accept this, believe something else, or even perhaps never heard. The reason this semi-divine being did this is because two naked people in a garden ate some fruit that his father had put in a garden and told them not to eat and they ate the fruit after they were convinced by a talking serpent. It is like me as an adult actually believing in Santa Claus and his eight tiny reindeer, without me being mentally ill or handicapped. However, a believer don’t think this is delusional but it actually happened because of a book put together by the Roman Catholic Church, the remnant or what is left of what was the Roman Empire. I can understand how someone can believe in an uncaused cause, an unknown intelligence that is innate in the universe or that is the universe, that caused the big bang or was the big bang, that goes from simplicity to complexity over an infinite amount of time, however, science hypothesizes that this universe will stop evolving and will one day die. This leads me to ask questions about science. How do I know science is true? How do we know the age of the universe? How do we know the age of the earth? How does science come to its conclusions? Why is this significant? Why do science believes that it is right? What happens if science is wrong? These are things which we should think about...