Unless you have an IMCr or IR(R) in the EASA world, personally I wouldnt suggest going on top of cloud unless they are clearly scattered and and remain so in the area you are flying (in front and behind). I think it's unsafe to be on top, in case the clouds do become overcast or you have cloud in front of you which you cant outclimb, and then you have no legal way (or practical experience) to go through those clouds back into a place where you can see the ground. As soon as you're qualified, start training for the IR(R) and then you can safely fly 'on top' and have the navigational skills to be able to deal with it as well.