INMO the best to start with are aluminum. Easton 2016 cut to 28" with 125 grain tips will fly perfect and the price is definitely right. The Easton "Jazz" shafts are exactly spine and toughness alloy the same as their 'hunting' shafts but much less expensive. Look on ebay for good deals.
If you dont mind fussing with tuning carbon shafts then the previous mention of Gold Tip blems from Big Jim is a good start too. But really, aluminum are more forgiving of release, short draw, etc for beginners.