Pumping up a SUP isn’t hard at all. If you’re using an electric SUP pump, connect the pump hose, set the desired psi, and turn the pump on. Wait until the board is fully inflated. Inflation time is typically less than 10 minutes.
Using a hand pump is a bit of a workout but anybody can do it with a good pump. It can get tough towards the end but if you switch to single action it gets easier.
Most pumps come with ‘inflate paddle board’ manuals too with specific instructions based on the design of the pump.