I've been working on a series of watercolors from sketches and photos lately. Painting in all forms, is a pretty immediate form of artistic expression.
Watercolor is indeed quick like the
acrylics we use in the Paint and Sip business, but is different in its nature.
Acrylics can be worked very wet (to look like watercolors), however, when dry can be layered on top of one another, based on how opaque you paint that layer.
Watercolors when dry (5 minutes or 5 days) is transparent no matter how thick you paint that layer. When activated with water becomes fluid and active. You paint in transparencys not layers.
As you render your piece, you can add detail with ink or any other media you choose to bring your subject into focus.
As far as the many techniques of watercolors, you can find countless videos on YouTube. I suggest get a pad of watercolor paper, a starter kit of watercolors, and just play! Workshop and experiment with your own methods. Keep all your "musings" and you'll have created your own watercolor vocabulary of techniques.