'Anthro' has a somewhat vauge and changable meaning on the internet. On sites like derpibooru it implies a bit more human element - a sorta' bi-pedal thing - but on dA, surrounded by pictures of realistic horses, there's no doubt that she's anthropomorphic. ^.^
Watercolour is quite a chaotic medium to work with and I think that most of the time knowing what not to do to avoid making a mess is key (proper watercolour paper helps too!). Once you can get one or two techniques down it's not all that tricky to make something but there's a lot more I want to learn about. :3
Yeah. You have to figure out the density of colors plus how much water to dilute the paint... it's a pain in my part. But like yours when getting the hang on is pretty good I'm mostly using color pencils and a few markers for lines if I draw traditionally.