Originally Posted by mr dave

that's about right though. 'low' action would be just wide enough to slide a single sheet of paper through, 'high' action would be thicker stock like a business card.

but yeah it sounds like it could use some minor adjustments if it's buzzing when you play softly (assuming it gets nastier with more pronounced playing). your options are to either take it back to the store and ask them to set it up (which will likely cost between $20-$50) though i really don't understand why music stores don't offer a free initial setup with an instrument purchase. kind of d1ck move to tack on another charge to new gear but whatever.

if you want to try it yourself you'll need to find a corresponding Allen Key (not unlike the wicked awesome Kyuss song Allen's Wrench) or sometimes called a Hex Key. either way 6 sided. you don't need to twist the truss rod much to make adjustments - it's basically a bolt within the neck. in order to raise the action you'll need to loosen the truss rod. it should feel rather snug and maybe even a little tight to start - that's fine. check the action the way LLSS described after every 1/4 turn until it feels right for you and the buzzing stops. shouldn't need more than 2 or 3 twists max from the way you describe things.

if the truss rod is already loose and doesn't feel like it's gripping anything then your action would need to be adjusted through the bridge saddles and that can easily mess up your intonation (where the 17th fret sounds off from the note at the 5th even though they should be octaves for example). in this case i'd take it to the shop and ask for a setup. it 'can' be done at home but it's WAY more hassle.