Have you got decent running shoes? That is key to avoiding injury. Plus a proper warm-up and -down, and hydration.
However, just to put it into perspective, in my fitter days, and having done a lot of training, I could run consistent ~8-minute miles and do a half-marathon in approx 1hr 45. If you are jogging you'll be on your feet for much longer than that and that's a challenge in itself.
If it's a race, they usually have a formal time limit to complete it, especially if it has involved road closures, and there'll often be a sweep wagon for the back markers.
I genuinely applaud your efforts, but be prepared for the reality.