Watering is a big part of the learning curve & it's different for all. When the top looks dry i bump the pot, if it feels lite i water.........in general. After awhile you can use water to control the plant.
25% of the water you put in should come out the bottom of the pot. I use 2 gal. water so i can get 1/2 gal. out & only enough nutes for 1 gal. so as not to burn. I use pot size to keep water on everyother day cycle.
So pot size controls water cycle & amount, water is a tool to manipulate the plant. That's all just an example of one little world.....everyone is different.