You want to find out for yourself if God is there, take the Book of Mormon challenge. Read it and ask the Lord. He will reveal Himself to you.
Why would I listen to Joseph Smith, who was possibly delusional or a con artist?
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Because you learn things by listening to others, no matter what your predisposition towards them.
Because the Book of Mormon comes with a promise unlike any other volume of scripture:
Behold, I would exhort you that when ye shall read these things, if it be wisdom in God that ye should read them, that ye would remember how merciful the Lord hath been unto the children of men, from the creation of Adam even down until the time that ye shall receive these things, and ponder it in your hearts.
And when ye shall receive these things, I would exhort you that ye would ask God, the Eternal Father, in the name of Christ, if these things are not true; and if ye shall ask with a sincere heart, with real intent, having faith in Christ, he will manifest the truth of it unto you, by the power of the Holy Ghost.
And by the power of the Holy Ghost ye may know the truth of all things.(Moroni 10:3-5
You are big on reason. What is more reasonable - 1) Experiment on the Word of God and do what the Lord says will give you knowledge of whether there is a God or not, or 2) Suppose you know better without doing any research or study whatsoever and without asking the Lord for yourself.
I would argue it's much more reasonable to actually investigate than presume you know it all without investigation.
The Book of Mormon provides a test for you to know that it's true. The Spirit will witness to you that it's true when you follow what the Lord says.
And the Spirit will likewise testify to the Bible and more importantly, He will testify that Jesus is the Christ, the Son of the Living God.
It was by the Holy Spirit that the Father revealed to Peter that Jesus is the Christ. It was the Holy Spirit that turned Peter the denier into Peter, the Rock (This was before Dwayne Johnson took on that persona).
Reason is only as good as the information we use to reason with. If we put bad information in, we get bad conclusions out. That's the flaw of reason. But reason can be used to lead us to the truth. If we want to know whether there is an all knowing, all powerful, God then isn't it completely reasonable that we need to have interactions with Him to know it? And how can we do that if we refuse to?