Such problem

Such problem It's easy to say hi face to face (when the other person is looking at me), my native language is not English, where hi is a little more difficult to pronounce hello on ukrainian for a stutterer. But back to the problem, it’s easy to say when the other person’s eyes see me, but it’s almost impossible to say anything behind the scenes (for example, when the other person doesn’t see me). Who also have this problem? What helps you in such situations