I am a TERRIBLE runner!  I lack the endurance needed
I am, too.  But there are "couch to 4k" programs out there for people like us.
When I was young I considered joining the military, but it is often a big component of the training.  I wish I knew about the couch to 4k program then!
I haven't tried running recently.  Have you?
No, I know I should because it is such a great part of physical exercise.  Some people even like it for recreation.  Which sounds terrible to me.
My wife enjoys it, and tries to get me to do it, but I've refused thus far.  I supplement with other cardio instead.
Cardio is a little more interesting and less intimidating for me.  At least some of it.  Like kick boxing.  It's good for mental health to.  I really should exercise lol
You can always try an at-home program like P90X.  I had good results with that, and it doesn't take much equipment.