I would suggest starting out small. I used to say "I'll do five workouts a week" then do one and get mad at myself. Now I workout almost everyday.
I agree to do things you like- you like walks? Take a few a week, then if you feel up to it move up to jogging and then running
I started with walks, slow jogs on my treadmill ($100 used on Craigslist), then added some resistant band workouts and started using some weights when I walked (3 lbs and 5 lbs). This week I've started taking aerobic classes and while they kick my butt and leave me useless the next day I REALLY enjoy them
It's funny- now I look forward to my workouts- before I hated them!