I do believe in the new testiment...and the teachings of Christ...but find much of the old testiment to be more mens explanations of the unexplanable than Gods written words, especially the older books of the Bible.
Jesus Christ spoke about and taught upon, the books of the now-Old Testament. You have the old covenant and the new, the Alpha and the Omega, the first Adam and the second Adam, Jesus. It’s inseparable. 6,000 years to create creation, a millenium of rest. 6,000 years of man in that creation, the millenium to come.
I don’t see how you can reject the foundation. It’s an intricate whole. I could go on, the fall of man introducing sin and death into the world, the restoration of the world removing that sin and death.
You’ll believe as you will, but I hope you’ll consider what I’ve written.