Jesus is God the Father in nature. Jesus came as the Son according to the prophecies of the Old Testament, and set examples for us to follow to be saved. He also allowed us to receive eternal life through the New Covenant.
God's work of redemption in the Old Testament times was carried about according to His choosing and His covenant. Jehovah, God the Father, chose the Israelites and made the Old Covenant with them, and He saved those who obeyed the covenant.
Is it true that God Jehovah is Christ Jesus? Although they look very different, the Bible clearly testifies that Jesus Christ who came in the flesh is God Jehovah, the Creator.