Regardless of what activities you choose - BE CONSISTENT. Meaning, even if you do something different every single time you are active, make sure you keep at it. Don't give up.
There is no "one way" to achieve a goal, but there are definitely wrong ways to go about it ie - crazy intense contra-indicated movements/activities that put you at great risk for injury.
Yesterday afternoon (no exaggerations) I saw to young men. Couldn't have been over 30. They had an aerobics step platform (the kind where you can adjust the height by adding/substracting risers) up against on of the columns that supported the ceiling. They were jumping (both feet) to see how high they could go (each time adding another riser) to see if they could keep landing, both feet, on the riser without grabbing onto the column to stabilize their landing.
I tried REALLY HARD not to stare.
What THE HELL were they thinking?
Aside from sheer stupidity like I just quoted above, keep changing it up every several weeks. The human body adjusts very quickly. Vary the intensity/frequency of cardio. Engage in activities that you like to do - get some result and a sense of satisfaction. Also activities that have least amount of risk for injury. Activities that are more difficult, should be worked up to slowly.
I've been in the gym for more than 25 years. And yet when I was out for two weeks with a virus it took more A FULL MONTH to get back to where I feel strong and productive.
Slow and steady wins the race. Consistency is key.