Was this in Gen 4:3-4 the first sacrifice?

Abel’s was the first thing in the Bible called an offering, and perhaps Abel’s was the first sacrifice described. It seems possible that Adam might have made some earlier and taught his sons, but that would seem to contradict a very telling verse found at the end of the chapter: “then began men to call upon the name of the Lord.” (Gen 4:26) But as to the first sacrifice, it is possible that God’s preparation of skin garments in Gen 3 for Adam and Eve also count as a kind of blood sacrifice.