Actually it is essential. All the early church believers were baptized. That was AFTER christs death.
John 3:3-5 In reply Jesus declared, "I tell you the truth, no one can see the kingdom of God unless he is born again.....
Jesus answered, "I tell you the truth, no one can enter the kingdom of God unless he is born of water and the Spirit.
Mark 16:16
Whoever believes and is baptized will be saved, but whoever does not believe will be condemned.
Acts 2:38
Peter replied, "Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins. And you will receive the gift of the Holy Spirit.
Acts 2:41 Those who accepted his message were baptized, and about three thousand were added to their number that day.
Rom 6:4 We were therefore buried with him through baptism into death in order that, just as Christ was raised from the dead through the glory of the Father, we too may live a new life.
Col 2:12 having been buried with him in baptism and raised with him through your faith in the power of God, who raised him from the dead.
1 Peter 3:12 and this water symbolizes baptism that now saves you also-not the removal of dirt from the body but the pledge of a good conscience toward God. It saves you by the resurrection of Jesus Christ,
(but your serving of God was not 'pointless' by any stretch of the imagination. Every drop was seen and counted (and valued appropriately) don't worry. Most people take some time after they first get to know God before they get baptized. I was in my early twenties and yet I grew up in the church and made a commitment to God very early on and followed it faithfully up to that point. Baptism in itself can't save you, (otherwise people could just get baptized and automically be right with God regardless of how they behaved afterwards) but it is an essential step when you feel ready for it. It signals a new life and a new beginning in christ and a higher phase in your walk. God knew my heart before I was baptized and he knew it afterwards, but the ceremony is signifcant in a christians life and carrys a spiritual weight and importance.