Every gardener has the experience of realizing they over watered something, especially when it is a new unfamiliar plant. When ever I have my watering can in tow, I could be about to hurt a new plant or propagation.
Picking up the pots you overwater when they are wet, and making a mental note of the weight, and then getting a feel for how different it feels when dry is one of the best ways to quickly decide a plant needs water,
The Welcome and Help Center forum (very bottom last forum on list) is a great place to quickly learn a few basics. The first thread is [Sticky] -- Help with site features by Trish, and give quickie answers to changing a profile or making words bold or italics, etc.
Have a great day.