looking good!, learning watering for your particular setup is a biggie. Indoor watering is somewhat easier than outdoor, no hot sun or drying wind to keep you scrambling. At the start numbers are good, gives a point of reference. As you experience grows you will be tuning into what each plant is telling you what they need. Ideally you want to water with no under or over watering issues. The goal being the elimination of stress before it happens. And, yes, underwatering is a quicker recovery than over watering. I've stunted young ones with overwatering, and slowed older ones to a limp standstill in early flower, taking at least a week to recover, a week I don't have this far North. If you are paying attention you can pick up the very first signs of thirst wilt, water now for an almost instant perk up.