This is the first of all the Sacraments in the Catholic Church, and it is the foundation of and door-opener to all the other sacraments. It is a sacrament of initiation along with Confirmation and Holy Eucharist. it cleanses us of our sins, makes us Christians, children of God and members of God's Church.
WHY IS WATER USED FOR BAPTISM? WHY NOT OIL, FIZZY DRINKS LIKE COCA COLA OR EVEN SAND? WHY USE A SUBSTANCE AT ALL? WHY NOT JUST VERBALLY BAPTISE SOMEONE IN THE NAME OF JESUS?
Every sacrament has its matter and form. The matter of baptism is water. Other sacraments may have blessed oil for them to be valid. The form of baptism are the words, true to Jesus' command: ' I baptise you in the name of the Father, and of the Son, and of the Holy Spirit.' I cannot baptise someone in the name of Jesus because he didn't ask us to do that. In Matthew 28:19 Jesus said clearly: 'Go therefore and teach all nations, baptising them in the name of the Father and of the Son and of the Holy Spirit.'
The Bishop, Priests and Deacons are the ordinary ministers of Baptism. However, in danger of death when any of the above are not present, anybody with the right intention may administer the Sacrament.
As soon as a child is born, she/he is ripe for baptism. Strictly speaking there are no timelines for it but it is recommended that the sacrament of Baptism need not be delayed unnecessarily.
Jesus was not only baptised by immersion in water, he was immersed in the river Jordan when about the age of 30. It is practically impossible to do that whenever anybody has to be baptised. The validity of the sacrament is neither dependent on the age of the person being baptised nor on the quantity of water!
You can see any of the priests to arrange a meeting. You will also need to fill a Sacramental Form. It normally takes a couple of weeks from the time you have filled the form, with some meetings with parents in-between.