If "I" were in your situation
1. I'd stay away from letting Golfsmith making decisions for you. Everyone else can get up-in-arms about this, but they are there to make money first and foremost. Their "expert fitting" consists of some +15 handicapper attempting to "guess" which clubs will work for you that will max out your gift cert.
2. Instead, talk directly to your trainer. If he's worth what you're going to pay him, HE/SHE will analyze your swing (swing planes, swing speed, ability to hit crisp shots) and give you some recommendations on club head types and and shaft flexibility (senior, regular, stiff). Just be sure to tell them you have a Golfsmith gift cert.
3. I'm going to make a shrewd guess that you will most likely be in the "regular" flex range. You might benefit from a senior flex, but let the person checking your swing speed and style decide that. I'm also going to guess that your trainer will want to set you up with some cavity back club heads since they have a bigger sweet spot, are easier to hit, and easier to get good distance out of them.
4. Don't forget that you will need at least 1 glove, shoes, tees, balls and a bag. Right there can already add up to $75-$125, depending on how tight you want to spend. This leaves you with $500 for clubs. Your trainer "probably" knows someone who can fit and build your clubs for you. You may also be able to find a used set either online (Craiglist...only buy local!!!) or even at Golfsmith. Also, get to know your club prices because Golfsmith is notorious for overpricing their used clubs. Remember, what are YOU willing to pay. You see a set of Ping G15's for $400? Tell them that's old technology and you're only willing to pay $300. They may drop them to $350, which, imho, is a great deal for a first set of clubs! (those prices are completely bogus, but you probably catch my drift). But that leaves you missing a driver, 3w, 5w and your wedges. I went out to GS this weekend and could pick up several older model woods (still decent) for $150 (for the set) and another $150 for a set of 52, 56, and 60 degree wedges. They were older, yes, but to get started, this is what "I" would do. In fact, Dick's Sporting Goods was selling last year's Cleveland wedges for $70 a pop.
5. Just remember, the game of golf to a man is a lot like shoes or purses for women. lol. There's always something new out there. Be careful on wanting the next latest and greatest thing. Think of these clubs as an old trusty dog. You'll get more love out of em that way lol.