Yep. When I started this journey at 287lbs, I was pretty much bed-ridden. Terrible shape. So I started a super low cal, low fat, low carb diet. And started walking in my house for 5 minutes at a time. Some days it was all I could do to make 5 minutes for the day. But slowly, the weight came off and my endurance increased.
It is not easy. But it does get better. Losing the weight, having the surgery, getting to normal weight, I exercise for 60 minutes a day about 6 days a week. I still walk. And then I do core exercises at home 2 days a week in addition to that. My pain has gone from a 7-9 down to a very manageable 3-4.