It can never hurt to try =) Watercolors are my favorite type of paint to work with, so I can't really imagine what I'd do without them. Make a simple inked drawing to practice on and give them a go, I say!
hm, I'm more the experimental type and don't really work with tutorials, so I'm afraid I don't really know any good ones to link. Perhaps this one: http://www.handprint.com/HP/WCL/ But it's really best to just try different things and see what you like doing. If you want to combine them with colored pencils, I'd suggest you make a simple wash of colors with paint and leave the details for the pencils =) And check which type of paper you're using, because it can really mess up your work if it doesn't go well with water.
Your art is very inspirational to all of us artists and at Shadowness we like to thank our amazing artists for all they do, to show our appreciation for you, your artwork has been featured in todays Daily Inspiration #771