RE: mouth calls
I have only been at this for three years, so take this as such. There are so many different opinions on this and a whole lot of different calls out there. But for me I sarted with HS true tone double reed calls and had good luck with those. recently I discovered the Quakerboy mini mags (I think that is what they are called) they are about half the size of a normal call and they fit my pallet real nice. I have stuck pretty much to the double and triple reed calls.
Good luck