I struggled a lot with watering early on! Overgrown plants in small pots have almost no water capacity in the soil. Plants you buy from the nursery are frequently overgrown for their containers and need to be transplanted relatively soon after you bring them home.

Also tricky is that if you put a plant in too large of a pot then the water capacity of the soil will be too high and then the plant can come down with root rot!

Now I’ve gotten used to checking the soil, especially at the bottom of the pot, for dryness and then watering as needed. It also depends on the plant species (plants can vary all the way from desert-loving dry species to fully aquatic plants)!