Maximum to how much volume helps catch small waves?

Hi,
On my beach we have often small not that powerful waves. I am looking for a board that can catch many of these small waves (often only 2 feet or less with a short 7s swell period or less). Also I am quite a beginner still. Therefore I am looking at longboards or maybe even a small surfing sup.
Now I am wondering if there is a diminishing return with respect to volume?
For example I am 79kg. Will a board with a volume significantly above 79l still help me catch more small waves? Or does it max out when the board has sufficient volume to keep me from sinking and will therefore a small surf sup with for example 120l volume or even more not help any more?
Cheers,
Lieuwe
On my beach we have often small not that powerful waves. I am looking for a board that can catch many of these small waves (often only 2 feet or less with a short 7s swell period or less). Also I am quite a beginner still. Therefore I am looking at longboards or maybe even a small surfing sup.
Now I am wondering if there is a diminishing return with respect to volume?
For example I am 79kg. Will a board with a volume significantly above 79l still help me catch more small waves? Or does it max out when the board has sufficient volume to keep me from sinking and will therefore a small surf sup with for example 120l volume or even more not help any more?
Cheers,
Lieuwe