RE: diaphragm calls
The style doesn't mater[cuts or no cuts] but the number of reeds does. I have started people on double reeds for years. Believe it or not singles can be harder to use than doubles. So a split v double will be a very good choice. One of the things that kills beginers is the reed size. It has to fit in your mouth right. If you are tring to swallow it or or gag on it you will never be able to call. Getting sound out of a reed will cause a beginer to quit too. And the trick to get sound is easy, SHHHHow heavy on the sh sound. Makes all the pieces work right now, but beware of the tickle. The first time the reed vibrates it will get you.
Gselkhunter