Keep working at it. Eventually you'll be able to do all that after a 60 mile ride. And then have no issue riding the next day.
However if you are feeling both tired and fatigued, you might not have hydrated well on your previous ride. Or very likely when you were doing the yard work too. When I was getting back to cycling regularly in my 50's my rule of thumb was to take 1 bottle every hour of riding. So unless you ride at 21 mph, you should have had more than 1 bottle of water or hydration mix. Typically I drink 1½ bottles on a short 22 mile I do frequently.
On the bike I have my hydration nailed down. Every 10 minutes I'm taking a gulp or two of water or hydration mix. But when I work in the yard or do other outdoor stuff, I find that I don't drink enough water. I suffer afterward for a time when I fail to stay hydrated during my work.
Last edited by Iride01; 06-20-23 at 09:57 AM.