Welcome back Barbara!
I used my 10th anniversary on low carb in August 2020 to try something new, so my Covid funk was limited to 5 months.

In addition to Dr Naiman's P:E Diet, https://forum.lowcarber.org/showthread.php?t=483930. Check out the information on Marty Kendall's Optimising Nutrition and Data Driven Fasting. https://forum.lowcarber.org/showthread.php?t=484792 Both have worked well for me. If you like podcasts and videos, you can find dozens of those too. One of my favorites with both of them: https://youtu.be/ilduzDTFUlQ