I am a native English speaker, but when I make the sound which should be /tʃ/, I have been told that I begin it by placing the tip of my tongue briefly between my teeth, as if I was going to start a dental fricative. It strikes me that this is somewhat unusual – the tip of the tongue should start behind the front teeth, no?
Is there a more accurate way of describing the sound I am producing? i.e. is it still a voiceless palato-alveolar affricate?
(Having read this on English Langage Learners SE I think I may be producing a sound closer to [t͡ɕ] [voiceless alveolo-palatal affricate], although my anglophone-ears struggle to distinguish these two.)