There is no 'right age' to get baptized. A person has to be mature enough to know what they are doing.
How many really know what they are doing when they are kids? So many have been baptized too young and either fizzled out or once they've grown into adulthood and are trying to get a life, have felt trapped and done something to invoke the disapproval of the congregation.
When I was baptized I recognized Christ as my Savior, repented of my sins and wanted to dedicate my life to God. I do not regret it, though I was only 15.
There is an added twist to today's JW baptisms which is a concern and would affect any who contemplate baptism: That *second* 'contractual' question!
"Do you understand that your dedication and baptism identify you as one of Jehovah's Witnesses in association with God's spirit-directed organization?"
Tut tut! That shouldn't be part of the deal!