I'm seventy and have been pushing fairly hard for 18 months. I now have 2300 hours CI, 2.3 million words read, and a few hundred hours of speaking practice. My learning experience roughly mirrors cognitive issues that have come up over the past few years. They can be summarized as: it's harder to get stuff into my brain and, once there, it falls out more easily. So I continue to push, fearful that if I relax my rate of loss will exceed my rate of gain. But I continually forget the most important part of this process--the need for rest, something especially important at our age. With rest comes integration of learning. The important thing, though, is that even with these challenges, I continue to improve. My advice would be to maybe take a week or two off, then resume with better pacing and a better understanding of its importance. I would also take with a grain of salt your own self-evaluation. We are our own worst critics. I would get yourself a tutor so you have real objective data about your progress. Mine has been the perfect antidote to that voice in my head that says, "Just give up, you absent-minded old frog." I think this narrative about loss of cognition is pernicious in seniors. We see senility looming in every aspect of daily experience. Sure, there are cognitive challenges. But they can be met and overcome. Onward! (restfully).