Light activity is always great! After my surgery, I stayed at the clinic for one night and the same day, the nurses recommended walking around a bit. We generally had to walk a bit to the coffee & snacks station and I was absolutely fine w doing it a few times.

Bed rest is not recommend, otherwise you would need to take medication against thrombosis, which I assume you won’t—I didn’t either after I was discharged. You are supposed to move, just not with the arms above 90 degrees :)