I've noticed a few posts on this site comparing the WT trend of young baptism to the practice of church infant baptism. There is absolutely no comparison. Most churches these days baptise older teens or adults not infants for a start. There is no compulsion to be baptised and once bapped no contract to attend or consequences of breaking rules - there are no rules to break as such. It is simply a show of faith and expression that you are serious about your belief.
As an adult, you may meet a few times with the minister to ensure you understand the step you are taking. On the day you would have the chance to give your testimony and have prayer. There is celebration afterwards whatever the age it isn't a dreadful sombre occasion like in JWs.