The Psalmist's Prayer to Jehovah

According to the Jehovah's Witnesses Bible, the Psalmist is saying these things to Jehovah God. So that sounds like something that a human being should say to Jehovah. Can we please go to Hebrew chapter one still in their Bible? Let's go to Hebrews in their New Testament and go to chapter one. We're not going to assume anything right. All we know is he's talking to Jehovah because he says Oh Jehovah.