A great choice for a first effort: a small vessel on a large scale. Helpful hint number one: have fun with it. Number two: learn from the experience. Number three: real skipjacks are among the prettiest, and simultaneously among the filthiest, boats afloat.
I used to work at the Mariners' Museum, in Newport News, Virginia. There's a skipjack model there that started out as the Model Shipways kit. It was started by a superb modeler named Marvin Bryant, who worked at the museum for many years but had his activities cut short by a stroke that left his right side paralyzed. He managed to build the hull of that model with his left hand. We ran into deadline trouble toward the end of the project, and I did the sails and rigging. I also did the figurehead and trailboards, on which I made a fool of myself. I spent hours making an elaborate, "realistic" eagle's head (out of Milliput), and meticulously painting the details of the trailboards. At that time I'd never seen a real Skipjack. When I got around to doing so, I realized that such a figurehead (with gold paint on it, no less) was ridiculously out of place on such a vessel.
When the model was almost finished I showed it to Robert Burgess, one of the world's authorities on Chesapeake Bay working craft. He said: "I've only got one question: why isn't there a horseshoe on the bowsprit bitt?" I found such a horseshoe, in the right scale, in a Historex military miniature kit. The open end goes up (so the luck won't run out).
I was happy with how the furled sails came out. The basic material I used was "silkspan" tissue - the kind that hobby shops sell to balsa airplane modelers. My personal trick is to mix up a batch of Polyscale (acrylic) paint in an appropriate, slightly brownish pale grey, and mix it with a roughly equal amount of Elmer's glue. I then brush the resulting concoction, dilluted to a suitable consistency with water, on the tissue paper and let it dry. Then I cut it to the full-size shape of the sail, with about 1/8" around the edges for a hem. I glue a piece of thread (for a "boltrope") around the edge, then fold over the hem to hold the thread in place (sticking everything with Elmer's again). Then I rig the sail to the model. Then comes the remarkable part. When I touch the sail with a water-dampened brush, the glue softens up but the paint doesn't. The sail acquires the consistency of a piece of rubber, so it can be furled up in really convincing, scale-like wrinkles and bundles. And when the water evaporates it will be stiff and surprisingly durable.
The MS instruction book is excellent, and contains some good references. For a few good color pictures (with some ideas on weathering), try the National Geographic. There are pictures of skipjacks in the October, 1980 and August, 1991 issues.
If you get a chance, take a trip to the Eastern Shore of Maryland and see the real thing. There aren't many skipjacks left; if you don't look at them soon, you may be too late. There's also a beautifully preserved skipjack at the Chesapeake Bay Maritime Museum, in St. Michael's. But be warned: if you visit that place, you're liable to want to build a bugeye, a log canoe, and a deadrise to go with the skipjack.