How old was John the Baptist when he went into the wilderness?

30 yrs of age is a standard age to enter into the ministry, with some exceptions like little Samuel. Parents educate them well according to the commandment of Jehovah. Every child must be educated in the Law of Moses as well as in other subjects such a politics, science, economics, general knowledge of the world. Attendance to the Synagogues is compulsory, in fact synagogues are the centers of education. Little Jesus was well-equipped by His mother so as to talk, discus the Word of God with the aged, well-educated Jewish leaders of the Temple.