I can’t imagine having that kind of cardio endurance right now Even I was thinking the same when I started running. Now, here I am. I think you can also do it.
I started with the target of 5k, once I reached that, my target was to run for 1 hour, then 10k and after that under 1 hr 10k. Now my target is to run a half-marathon.
Last week I ran my first ever under 1hr 10k(56:20 to be precise). I had run 10k before but my PB was 1:08:00.