Rhodesian Ridgebacks are big. strong dogs. We have owners in their 80’s with no problem handling their dog, but we have also had owners in their 60’s return their dog after a few months due to a fall (from the dog pulling), and broken bones.
If you’re not able to commit the the socialisation and training requirements, your ridgeback will likely pull you over (even if you’re young and healthy, and the dog is poorly trained). Continuing with obedience raining will help the dog be more responsive to your needs.