Mike69,
Sounds like you are taking private lessons. Try group lessons at bronze level. Learn the chorography of one dance you like, and practice it with your wife. Keep repeating until you know the chorography well, so you can dance two walls and repeat.
At that point take a few private lessons. Tell the teacher that you dont expect to be technically perfect but you want to be more fluid in your movements. So the teacher should not overburden you with difficult technical material, just make dancing more enjoyable. Tell the teacher that you will return later to improve your technique, but for now you just want to enjoy dancing.
You said you dont have a feeling for rhythm. Never mind, ask your wife to count, for now. Who said that dancing is easy? It is one of the most difficult sports. But a great sport.