From the Catechism of the Catholic Church:
The Bible is a collection of writings, not a single book written in only one style and with only one purpose. Each author conveyed something about God to us, but each in his own way and to certain persons and for various reasons. This is why the Bible needs an inspired interpreter, which is what Jesus gave us in the Church when he commissioned the Apostles to teach and preach in his name. For instance, the NT is the written accounts of Jesus’ life and mission, a brief history of the very early Church, the instructions and admonitions of the Apostles, with the singular visionary work of St. John in Revelation. We can see the imprint of each author’s personality, mission, charism, etc. in what he wrote.
But, in a nutshell, the Catholic Church holds that the Bible is inspired of the Holy Spirit and so reliable in all it tells us about God and the human condition.
It’s history is trustworthy and it cannot be written off as mere fairy tales, which is very different from writing in the mythological form. Mythology, as it is truly understood, tells us eternal truths using the language of symbolism. However, most of the Bible is not written in the mythological style, but as plain history, poetry, biography (told not for biographical information only or necessarily as we moderns would write it), prose, etc. The Bible is a rich cultural and historical book, but it’s much more, as well.
We Catholics embrace all that the Bible is, and do not employ it to prove anything for it is a witness to the work of God among men not a proof-text for doctrines/dogmas, although all that the Church teaches is upheld in Scripture or finds its origins in it. I hope that helps.