I have been watching some documentaries on TV that cast doubt on just about everything I have been taught about Jesus and the Bible. For example, Jonah and the whale and Noah's Ark. I feel frustrated about whether we need to believe everything in the Word of God or not.
Much of what you are hearing is known as ‘liberal theology’, a system of philosophy that attempts to downsize God to man-size! The time of miracles will be past when the God of miracles ceases to exist! And that will never happen. "For I am the LORD, I do not change" Mal 3:6. "Jesus Christ is the same YESTERDAY, TODAY, and FOR EVER..” Heb 13:8
"ALL Scripture is given by inspiration of God" (2 Tim 3:16) and may be trusted. Jesus said that heaven and earth would pass away, but not His words (Mark 13:31). If it's in the Word, you may believe it. Incidentally, Jesus believed the story of Jonah - read Matt 12:40. He also believed the Scriptures concerning Noah and the ark - Matt 24:37-39.
"Don't let others spoil your faith and joy with their philosophies, their wrong and shallow answers built on men's thoughts and ideas, instead of what Christ has said." Col 2:8