The general understanding is Jesus is the angel of the Lord or word of the Lord in the old testament. Also you get some weird plurality in the old testament where the Lord is speaking to the Lord or jehovsh speaking to jehovsh.
When you read the new testament it becomes pretty clear that the authors believed Jesus was the second visible jehovah of the old testament.
This is only a message board so I am not going to write a book but do the research of appearances of Jesus in old testament . Then the pieces start to fall together.