I’m Not Sure Weather Or Not I Believe The Bible!!!?

I am having a hard time believing a book written by man!!! I understand the bible and i’ve read it but am still having problems. It tells about these crazy feats that happened and they are outrageous! Second of all people go to church and believe that moses parted the red sea and jesus walked on water. Then take those same people out of the church setting and let someone tell them that jesus talk to them and into the straight jacket you go! Also where did the dinosaurs get mentioned etc etc etc Hard to believe that a book written by man thousand of years ago is true and that jesus might have just been another david blaine with a sales pitch!!!