I'm 100% ready to switch from the Standard American Diet to McDougall.
Being "100% ready" means
making a commitment to change in whatever ways are required to meet your health goals.
But if, for whatever reason, you still choose not to cook, my suggestion is, Plan A
: Don't cook. Continue to "take out." If you can't find 100% acceptable items at Wendy's or other take-out, then go to the ultimate take-out: a big grocery store.
Take out: fresh or frozen vegetables and fruit that can be eaten raw; frozen or canned starches already cooked (rice, potatoes, beans, peas).
: Hire a cook.
Both plans are very easy, which seems to be your only requirement. (You don't mention taste or cost.)
P.S. -- As I understand it, the McDougall Program includes not only a healthy diet but also exercise as an indispensable element. That will take time, ideally every day. You will need to develop a program for gradually increasing the time or the intensity or both. As with diet, the transition is the tough part. Once you are in the new, healthy routine, life will be easy again.