Revelation 4 - heaven. 24 elders and 4 creatures

02 major thing John Saw IN Heaven
1,  24 elders
2,  4 creatures

Revelation 4:4 NIV
Surrounding the throne were twenty-four other thrones, and seated on them were twenty-four elders. They were dressed in white and had crowns of gold on their heads.

Revelation 4:7 NIV
The first living creature was like a lion, the second was like an ox, the third had a face like a man, the fourth was like a flying eagle.

Revelation 4:8 NIV
Each of the four living creatures had six wings and was covered with eyes all around, even under its wings. Day and night they never stop saying: “ ‘Holy, holy, holy is the Lord God Almighty,’  who was, and is, and is to come.”

So far yet to find out what is the 24 elders and the 4 creatures mean.

Google.
There is no clear conclusion. First there is an argument that if the elders are angels or man?  Then why 24?