For your gun you should try a few different sizes of shot and see what your gun patterns with best. But something in a heavy load, 3 inch magnum of your gun will shoot it, and try #4,#5, and #6. Any of these shot sizes should work for you, but use the one your gun likes the best.

For an easy to use call for beginners, I d try a simple push button call, and a easy to blow double reed mouth call if you can use one. You may also want a locator call like a barred owl call to locate your bird on the roost. Good luck welcome to the addiction!