Receive New Life in Baptism: Colossians 3:1-4(NLT)
“When you came to Christ, you were “circumcised,” but not by a physical procedure. Christ performed a spiritual circumcision—the cutting away of your sinful nature. For you were buried with Christ when you were baptised. And with him you were raised to new life because you trusted the mighty power of God, who raised Christ from the dead. You were dead because of your sins and because your sinful nature was not yet cut away. Then God made you alive with Christ, for he forgave all our sins.” Colossians 2:11-13 (NLT)
This is the New Covenant to the believers of Christ Jesus that you are buried with Jesus and rose again to have New Life which is equivalent to the circumcision in the Old Covenant. All have to take it in the age when they understand sin and the forgiveness that is available through the blood of Jesus. A new born child cannot understand any of such things so the baptism taken at that age is of no use and it is not Biblical. As the verses above clearly state that we are buried with Jesus and raised with Him to a New Life. It is not worth to lose your life over false teachings and traditions.
Receive Holy Spirit by Baptism: Matthew 3:13-17(NLT)
“Peter replied, “Each of you must repent of your sins and turn to God, and be baptised in the name of Jesus Christ for the forgiveness of your sins. Then you will receive the gift of the Holy Spirit. This promise is to you, to your children, and to those far away—all who have been called by the Lord our God.” Then Peter continued preaching for a long time, strongly urging all his listeners, “Save yourselves from this crooked generation!”” Acts 2:38-40 (NLT)
Here it is clearly given that those who have taken immersion water baptism will receive gift of the Holy Spirit. And to those who have already taken water baptism this verses are for you to tell that you would definitely receive the Holy Spirit. When Jesus came out of water baptism, He was anointed by the Holy Spirit and operated in the power. So start operate in the spirit and put your gift into practice. Do not think you have not got it, but start speaking in tongues and prophesy. I have received Holy Spirit with the evidence of speaking in tongues in a prayer meeting; but it would have been an one time event, if I have not pursued and practiced speaking in my private prayers. The gift got to be exercised.
“This is why I remind you to fan into flames the spiritual gift God gave you when I laid my hands on you. For God has not given us a spirit of fear and timidity, but of power, love, and self-discipline.” 2 Timothy 1:6-7 (NLT)