I asked if it was okay just to get wet up to your waist. Nope full immersion. IO said okay how about up to the shoulders. Nope the Head has to get wet he said.
My reply was: So the Catholics are right just getting the head wet.
On a serious note. Read the Didache, it tells of the various accepted methods.
When I was baptised Catholic at the Saturday Easter Mass, 2008, it was the most beautiful ceremony in the world. The Church had one of the biggest baptismal fonts I have ever seen. I put on a white gown to signify purity, stepped in the font and Father O’Leary placed his hand on the back of my head and dunked me three times. “I baptise you in the name of the Father (dunk), Son (dunk), and Holy Spirit (dunk). Babies and young children had water sprinkled on their head.
The amount of water used is up to the priest. Some pour water on the head of the one being baptised. Father O’Leary really gets into it and turns into John The Baptist!
No need to read the didache when we have the bible...It's anything but the bible for your religion...