This video can give you some insight into what is in your way of exercising.
I’d also like to add that you can find something you like/love doing, for those that hate exercise.
Do something to create momentum to build a habit of exercise in your life. Even if it’s just a 5 minute walk or a 2 exercise routine, it’s a start.
Give yourself credit for doing something, no matter how small.
Then, rest when your body needs it.