Since you're new, might as well start with the paint in Reaper Learn to Paint Kits. Reaper's the only company I know who puts one out. Since the kit also focuses on a specific miniature, I like that they already select the paints you will want to paint it. FRPGames will be carrying the new Bones Reaper Learn to Paint Kits next year.
Speaking of triads and wet palettes, the triads make a nice brain-dead way of making a gradient of colors on your palette! Drop the shade, midtone, and highlight in a line, mix them at edges, and viola! You have *five* different colors to use on your miniature, from shade to highlight. Add further related colors for more transitions. I like to make a gradient starting from lightest brown to darkest for leather straps, armor, etc. on a miniature.
I often see paint sets on sale, so mebbe that's one way to start experimenting what works for you. FRP has a "50% off Clearance" sale, including a Mantic Forge Father paint set, by Army Painter.
See also Romain's reviews of various paint brands:
http://www.beastsofwar.com/mantic-games/3-colours-review-mantic-paint-set/
FRPGames sale, ends 12/31. Wyrd product results
http://www.frpgames.com/cart.php?m=overstock&div=0&level=0&mfg=WYR