Faith comes first Mrs. Don-o. And we can't even take credit for the faith because it's Christ's faith working through us. But let's take you list and look at it.
"believing"- the Greek word used their means "have faith in".
"repentance" - Greek-metanoeó - to change ones mind from faith in something to faith in Christ.
"baptism"Br> Jn 3:5 - being born of water is NOT baptism. It's the natural birth of humans.
1 Pet 3:21 - it isn't the ritual of baptism that saves. Baptism is symbolically being raised with Christ through faith.
Jn 6 - "the flesh profits nothing". "eating the flesh of Christ" is internalizing and having faith in the words of God.
All goes back to faith in Christ. The Catholic propensity to try to "merit" on man's part is blasphemy and will only lead to sorrow and doubt.
That's why it quickly turns into a non-productive discussion. If flesh doesn't mean flesh, and blood doesn't mean blood, and water doesn't mean water, and there's no "carne" in Incarnation, then Christ's words and actions can be systematically denatured and redefined.
It's easy to do. Just start with a particular human tradition (e.g. "faith alone") and then read it back into the text, no matter what the words say. Even though St. Paul says that if he has faith but not love, he is "nothing."
I suppose "nothing" don't mean nuthin'!