God loves you whether or not you are baptized.
Baptism is something God does through the church: we do not earn it but it is all about God’s unmerited love or grace for us.
Baptism is a sacrament is all about experiencing the justifying grace of God, letting that love define us and claim us (washing away sin), and a God-thing that initiates us into a new kind of life.
In the United Methodist Church, we baptize infants, youth and adults. The amount of water isn’t a big deal: baptism can be by sprinkling, pouring, or immersion.
Baptism is a communal event and almost always (except in cases of illness) is done within worship with the congregation present.