You can call it what you will, but you are actually very confused about the
Let me show you..
first........salvation is not discipleship.
Salvation is all of God, because its completely based on God on the Cross shedding blood and dying to then OFFER this sacrifice as John 3:16.
See that?
Discipleship, on the other hand, is all of the believer doing this....>"present your body a living sacrifice" , with God's help.
Now, there is this...."walking IN the Spirit.
That is neither of those, which explains why you read the phase "walking in the Spirit".
Notice this isn't "Salvation" or 'Discipleship"?
That because its different.
Walking IN the Spirit.........."In".....The.........>>"Spirit".
So, where is the Spirit?
How do you walk in that?, as that is not deeds or effort or anything you do.
Its instead a place of BELIEF, .
Its to align you mind, as the "renewed" mind, so that your understanding of who you have become "in Christ", is always how you perceive yourself, as this is how God always perceives the born again.
Now, if you are just water baptized, being told that the water washed away your sin, then you are still not born again.
But if you have received the Spiritual birth that is to BECOME "the righteousness of God, IN CHRIST"< then there is a MIND that you are to exist within, that is to walk in the Spirit.