Oooof. How long have you got? 😁Leaving the personal 'feels' aside, which I think is far harder to convey and not necessarily that convincing to someone else, there's a lot of logic in the Bible and a ton of fulfilled prophecies that it would be very hard to 'make up' as stories, especially with many different authors over a long time period.
Moses wrote the first copy of the Torah (the first 5 books of the OT) on scrolls and these were faithfully copied by subsequent priests and passed down to the people. These are real physical things, documenting the events that happened. Onwards from there, others also wrote various documents of their experiences. There are several books of prophecies (many of which have come true, some are yet to do so, but will in the end times).
By reading the whole Bible you can learn of God's nature, his characteristics and how he interacts with his people. I find it very moving, to be honest. He loves us so much, he always pursues us and doesn't want us to perish, although he must punish evil as he is a just God. Also I love God's amazing mind for detail and his artistry, in his temple design and priest's clothes, all documented in the Bible.
I could go on for a long time about it, but I won't bore you! I just know the more I study and learn from the Bible, the more amazed I am at God and his plans, and how much he loves us.