This is a new skill for most humans and non-humans alike. Even if you do not see results at first, keep trying. Persistence will pay off. Try 15-20 minute sessions on a regular basis. In your efforts to communicate, remember that non-human animals frequently convey information through posture, vocalization, gestures, and actions both to other animals and to humans.
Animals are much better at understanding signals from humans than vice versa.
A clear image in your mind of what you want to communicate is much more important than the words that accompany it, so spend extra time mentally drawing that picture before you try to transmit it. Balance and center your own energy. Let other distractions slip away and practice sending your messages before trying to receive. As you feel more comfortable, try to sense what is being sent back to you. It is imperative that you keep an open mind at this point.