Hello, I'll try to help as I can, but Genesis IS indeed true......There are a few verses that describes that ALL scriptures are true, but before I get into that, I will explain that Genesis has been backed up by the its own anti-source believe which is The Evolution Time Table.
If you compare the Time Table of Evolution with Genesis, you can see that there is no difference and that each time frame/sequences of events of the time table matches that of Genesis, what was suppose to disprove the bible actually backs it up.
Next In Scripture: 2 Timothy 3:15-17 says:
"
15You have been taught the holy Scriptures from childhood, and they have given you the wisdom to receive the salvation that comes by trusting in Christ Jesus. 16All Scripture is inspired by God and is useful to teach us what is true and to make us realize what is wrong in our lives. It straightens us out and teaches us to do what is right. 17It is God's way of preparing us in every way, fully equipped for every good thing God wants us to do."
^This mean that ALL Scripture (the Holy Bible.) is inspired by God, inspired meaning to create/think before put into action, Also inspiration and be inputed into human minds, Such as the authors of the chapters of the bible, even though they're were written in different histories and times, and with different styles, because it is inspired by God, All chapters are linked to each other and a revelant to one another, enabling the Bible to be infalliable to human intellect. And because God cannot lie, what He says is the truth, Genesis is one of the most trivial yet the most evidential.