Hiya BFDad, welcome to the
Hiya BFDad, welcome to the group and congrats on your rediscovery of running as a joy, not a chore.
I'll echo what these other dudes are saying about static stretching before activity and how it's somewhat overrated for preventing injuries. From the research I've done and my own limited experience, I can corroborrate that warmup activities and "shaking loose" your joints is usually adequate to prepare you for a run.
Stretching afterwards is a great idea, though... and feels fantastic. I do a lot of calf/Achilles stretches, which hurt so good. I also stretch my feet/ankles by assuming a kneeling position and stretching (curled toes) by rocking gently backwards with my butt on my heels, balls of the feet on the ground... then, point my toes so they lay flat beneath me, which stretches that anterior muscles on my ankle/shins. And my favorite stretch is a yoga position called Pigeon Pose, which is an amazingly effective stretch for the I.T. band and the glutes. It's easier to just have you search for it on Youtube, as trying to explain it in text would take a while.