Are you finding yourself with time on your hands due to the pandemic or winter weather? If you are bored why not use the time to take a free online class from Harvard, Stanford, MIT, or other top universities? There are so many interesting classes from which to choose. They say one should never stop learning. It keeps the mind active and creates new neuron paths that may help ward off memory issues as one ages.
You can also check out the catalogs at https://www.openculture.com/freeonlinecourses
and https://www.coursera.org/courses?query=free for starters.
Perhaps you and a friend may want to take the same class together to keep each other accountable and to have someone to discuss what you are learning. Why not give it a go?