I'm in the best shape of my life and yet these indicators of average health do not really represent me. Getting in that shape I believe saved my life when I got covid prior to the vaccines being available to everyone (Jan 2021). It was a couple of rough nights breathing with mild heart/chest inflammation. Thankfully that all went away with enough time (up to 10-12 months).
My lung capacity has increased from all of the cardio and my resting heart rate is in the 50s down from the 80-100s years ago. Wim Hof's deep breathing exercises have helped me through all of this not only by increasing my lung capacity, but also the mindfulness brought when in extreme discomfort and pain. If you experience any type of anxiety or breathing difficulties, give his techniques a try.
Exercise has so many benefits that it's hard to express in a single comment alone but should definitely be a priority in life when you realize them in your own journey.