Glad it made sense in practise
Basically, (and within certain system and atmospheric limits), the Airbus FBW will "stay where you put it".
So if you gently roll on 10° bank, for example, and then return the side-stick to neutral, the aircraft will stay at 10° bank, until you move the side-stick out of neutral again. You could even take your hand off the side-stick, and the aircraft would stay at the new attitude, (within certain limits).
If you are on a turbulent approach, and a gust makes the aircraft roll, the FBW will automatically correct that roll and return the aircraft to whatever attitude you had before the gust, (within reason). So the pilot has to bear in mind that if they put in a handful of side-stick as well, it might be too much. And if they hold the side-stick out of neutral too long, the aircraft will continue banking further and over-shoot. Then the pilot has to correct the other way, and might overshoot again = PIO.
As vilas says; You get used to allowing the FBW to react and correct first before wading in too deep, but this becomes second nature. This is why correct - neutral - repeat is a good technique. As the attitude approaches what you want, put the side-stick back to neutral.
I taught myself to use the side-stick after happening to see a film on TV taken in the cockpit of a Tornado fast jet as it was low level,flying. The Tornado has a FBW system, and the pilot said over the intercom to his navigator; "coming left 5°", and he just more or less bumped the control stick to the left then neutral twice; as quick as it takes to say "bump bump". The aircraft rolled left and turned, staying banked with no further inputs. Ah ah, I thought, I wonder if that technique will work on Airbus FBW side-stick - and it does.