Those in higher levels of church leadership approved and in 1973 Yohana went to Busiya, Shinyanga to attend Kolandoto Bible Training School. He completed the three-month training course for AICT church evangelists and then returned to Nyashimba to follow in his father's footsteps as an evangelist.
Viongozi wa ngazi ya juu ya kanisa walimpitisha na mwaka 1973 Yohana alienda Busiya Shinyanga kusoma Chuo cha Mafundisho ya Biblia Kolandoto. Alimaliza miezi mitatu ya mafundisho ya uinjilisti kwa AICT na baadaye akarudi Nyashimba kufuata nyayo za baba yake katika kazi ya uinjilisti.