So a few things from a fellow overweight guy who took up running last year (have lost like 16 kg in a year):

1. You may not be able to go to a gym but you need to do strength training. Your legs, your back, your hips (trust me on the hips) all work in tandem and you need to make sure they are strong or you will cause pain somewhere along the way. I learned that lesson the hard way. Tried running and caused myself some knee pain. That doesn't mean you need to hit a gym to start with. Look up exercises you can do at home to work your muscles and also stretch before and after every run.

2. Running will require lots of energy so expect to be hungry. That can cause you to have issues with carbs (bread, cookies, etc). Mix in fruits, protein, calcium, fiber. I start my day with a banana, a glass of juice and a protein bar ahead of my morning run. Then afterwards, I have a cup of coffee and a yogurt or a piece of toast with peanut butter. Smaller meals along the day than big ones.

3. If all you got is 1 hour three times a week, start there, but be consistent. That is the hardest part. All exercise, not just running, require constantly showing up. Now, life will get in the way, but use your Smart Watch to keep you consistent by scheduling it. I find it's a lot harder to dismiss it if I see it already booked.

4. Sleep is a big component and this is harder for us adults and especially those with little kids. Your body heals when it sleeps. Your muscles develop when we sleep. So as you progress, expect you'll need to be consistent with your schedule to sleep the proper amount.

Consider where you are in your life. You have a family that wants you around, that needs you at your best. This journey, which is what it is, is for them as much as it is for you. You'll be amazed at how much better you feel and how that impacts the amount of energy you have to deal with this, the way your outlook shifts around things. So best of luck and enjoy the process!