Hi Grags, I seem to be late on this thread and maybe you are gone or maybe, just maybe you are still reading. Well, welcome!
One of my most favorite subjects in the NT is grace. I truly believe that for a christian everything stems from receiving and giving grace.
Best of luck in your bible studies. By the way, you should ask your study conductor what they mean by overlapping generations and then have them show you that specific explanation in the bible.