Steady , Steady .
I had my op end July 2020. i was fit and healthy before hand, and "trained myself for surgery.
I was walking 3km after a week or so, very slow. Built up my confidence but did no weights for some weeks. i went on a 3km run after 6 weeks, very slowly but no issues, leakage etc.
I returned to work and to exercise, in Oct 2020, and steadily bulit up my strength and confidence. i didnt push myself, just did what i could, and avoided pain. If there is pain you are doing too much.
I am now out running 8km, doing circuit training, and basically back to where I was pre surgery.
Its a long path, but you can get there by being careful and patient.
listen to your body.
Keep doing the exercises , they really do help .
Best of luck