Maybe check out Couch to 5k

That's one possibility. I'd definitely recommend starting very slow. I've just recently been starting to exercise again, and I had some Achilles tendon pain by doing too much too quickly.

I don't have a whole lot of experience with bodyweight exercises, but I would definitely recommend squatting and lunges to help strengthen your legs and core. Upper body exercises like assisted pull-ups.

Don't be discouraged by not being able to do a lot at first but focus on getting better with each work out. I've been having to do that lately knowing I have the strength/stamina to do more, but my body is just not ready/used to the movements.

If you need some added motivation (I know I do), it'd be cool to either keep in touch on this thread or messaging to log our workouts too