I would agree that we inherit “original sin” as part of our fallen human nature, but that is not something we do ourselves. Can a baby commit an actual sin? Can a baby break one of the ten commandments?
Babies die, right? Then babies are sinners.
"In him you were also circumcised... having been buried with him in baptism and raised with him through your faith in the power of God" (Colossians 2:11,12).
Baby boys in Old Testament Israel were circumcised at a young age too--eight days old. The Bible compares baptism with circumcision.
We are born sinful.
God Bless