Translation:The child is walking with a man and a woman.
I was having the same experience as you are up to yesterday. I felt like I was only getting many things right the second or third time because I had basically memorized them at that point. Today I did some research on grammar and cases, and also found that Wiktionary is a great resource (there are probably others as well) for seeing full cases and declensions. Things are starting to fall into place for me. Concepts are not quite sticking yet, but they are starting to make more sense. I hope you stick with it, because it will eventually start to make sense.