Can I ask how many reeds you are trying use?It is best to start with a nice double reed call in my opinion that way you still get the 2
tones.It sounds to me like you are moving a lot of air to get the reeds to work it doesn't sound bad it just sounds like you are putting a lot of pressure or having to blow hard t get it to go. I have used a lot of different mouth calls in my years of turkey hunting . Some of the easier ones to work are perfection double reed,Primo's sonic dome triple bat cut,primos hacked off bat cut, with the green and black top reed and everything from Gooserbat that I have tried has been super easy to run with out a lot of work. I have had to try and throw a lot of mouth calls away over the years but I hardly go over a triple reed anymore.Keep practicing and trying new ones and you will find what you like