for a beginner, who is still learning, I would watch the top, as the top layer of the soil won't dry untill the layer of soil underneath is dry beneath it, and so on and so forth, your medium is a spunge, if ther IS moisture in your medium, it will be pulled to any dry spots, if you notice dry spots, then there is no moisture to be pulled. and yes of course you water less with a big pot, common sense maybe... and why are you going to let your plant start to go into shock and start wilting, that's the most absurd thing i've ever heard, CANNABIS DOES NOT LIKE ITS FEET DRY, it likes to ALWAYS have a bit of moisture... like I said before ANYONE else chimed in,get to know the weight of the pot, that is you best way to check, but since you are still learning, refer to the beginning of this paragraph... and yess most of all enjoy yourself, you are on the road to one rewarding hobby.