[T0pAz]

It depends on your goal. If you want to edit a script then it's easy. If you want to make a whole new conversion to an existing script then it's not that hard. If you want to make a gamemode from scratch depending on the gamemode type it's not that hard also. If you want to make a library, then it's hard. And like Vince said, if you don't have any experience on programming, it might be harder for you to achieve your goal.