NFZ Master

Hello, have a question? Work in a MAN workshop in the first year of the journey. But I would like to get further training and had thought of the master. I browsed around the net and came across the master schools in Münster and Lower Franconia, which offer the specialization commercial vehicle. Did someone make the master there???? Which topics, really only commercial vehicle technology???? How are the schools??? Will only Nfz be tested??? Is part-time recommendable??? I am grateful for every Hil Page 6