If you only care about general fitness for general life stuff, almost anything and everything will work. You don’t need a program or a plan.
Just focus on hitting two or three 30-minute strength training sessions each week. Top that with some cardio and get in your daily steps.
But even if you don’t need a plan, you still need to manage fatigue and training intensity.
Going easy in every workout won’t do much for your progress.
Going hard in every workout is even worse.
-J