Hi and welcome back!
I am too not a lover of exercise, not even a liker of it. You DON'T have to do major exercise in the begininng. A 15 minute walk for starters, you will be surprised how quickly you will be able to do more. Stretching, dancing, leg lifts. Just moving. I just keep adding movement to my day. When I'm brushing my teeth or washing the dishes or blow drying my hair - i kinda put a little extra wiggle in it. I know it sounds silly and it surely won't be gaining me any muscle, but it does burn calories. I no longer use a laundry basket, yup I walk back and forth with first my dirty clothes and then my clean ones. Bathroom - laundry room- bathroom -laundry room. It takes me a few trips to fill up the machine. I try to sneak in exercise everywhere. When I'm picking up things from the floor, I have 3 kids and 1 husband, I do it a piece at a time, more bending down. I take out the garbage much more frequently. I'm not a big TV fan, but when I do watch I get up at every single commercial and do something. Straighten up a few things, wash a dish or 2, walk to the other end of the house, something. Because something is better then nothing and nothing is what I used to do. You'll see as you go along that you will be able to increase your activity level. This is another simple thing I do and often - I dance vigorously. Very easy and doable. And sit ups, you get to do these lying down, a big bonus, I started out barely able to do them, now I'm up to 2 sets a day of 78, very often 3 sets. The weeks where I move myself more, I lose more, plain and simple. Good luck!!