Of course it is.
A lot of the events, words or messages of the OT prophesied about Jesus.
Jesus is a second Adam and greater than Moses. Jesus was prophesied by the prophets, and the Gospels tell us how he fulfilled those prophecies. He was the suffering servant of Isaiah 53 and gave the sign of Jonah, pointing to his resurrection.
The first Messianic promise was given in the Garden of Eden, Genesis 3:15.
Some of the OT stories teach us about God and the relationship he wants with us.
Both.
Stories are important; teaching, prophesy and accounts of how God saved, and relates to, his people are important.
Just as important is understanding the background, culture and context of a book, or passage. Who was the author writing to and what would those who read the Gospel/Epistle have understood by their words?
It's far too easy to read the Bible though modern eyes, modern culture and modern values. In the OT, for example, animal sacrifice was normal and accepted. We don't have to go round slitting sheep's throats today - Jesus died as the once and for all sacrifice. But we should understand why killing animals was so important. The 23rd Psalm says "The Lord is my shepherd". Nowadays sheep may be driven by a shepherd, or sheep dog and put into secure barns at night. In those days, a shepherd led his/her sheep - going before them to remove stones, poisonous plants or anything that might harm the sheep. At night a shepherd lay down across the opening of the sheep pen; nothing could get in without going past the shepherd. If we don't know/understand these cultural differences we won't be able to really appreciate how the Lord is our Shepherd, and Jesus the Good Shepherd.
To properly understand, or appreciate, the teachings it is often helpful to look at the Greek/Hebrew to find out what the text said in the original language.
But any translation of the Bible is God's word, and Jesus is THE Word of God.