Ditto the good shoes. Plan on sticking with any exercise program for at least 2 months even if you hate it or are short on time. You have to do it at least that long for it to become a habit. Otherwise a break for a couple of days turns into a month than you stop. I'm 49 and have been running/exercising most of my life (got lazy in early twenties).
Plan to change those running shoes out fairly regularly, first sign of my shoes going is my back hurting- used to get 6mos of heavy use, now I get 3 mos of heavy use ie when running 4-5 days/wk (which stopped doing when knees started acting up- more below).
There are other aerobic exercises that are easier on the joints. Elliptical, bike or stationary Bike, swimming, rowing machine, treadmill. I say rosaries during aerobic type exercise. I used to run 4-5 times a week but now I run once a week, lift twice a week, and do some other aerobic type stuff above 2-3 days a week. You may find that you will like and stick to a variety more than just jog/run.
And again- talk to dr, start slow and build up, stick to plan until it becomes a habit- no exceptions in first 2 months.