Cheap stuff first before you dump over $2000 for a single sail.
I start by sighting up the mast. If it looks straight then tighten the shrouds and lowers. If they go slack in less than 13kts, they get tightened until the slack is gone. Head stay and back, I can't advise, as I have an adjustable back stay and a large fractional rig. 15/16th.
I've found that being new to sailing and racing myself, the more tell tail, the better. 9 tell tails on the head sail, and at least 4 on the leech of the main. Make sure they break (luff) all at the same time. If the uppers are breaking sooner than the lowers, you have too much twist in the sail and you need to move you car leads forward to close the top part of the sail. If the main has the same issue, then sheet it in until the upper tell tail is breaking 50% of the time. Use the traveler to adjust the "angle of attack" to the wind. After you get the mainsheet trimmed, you should ONLY be playing with the traveler unless the conditions change.
Cunningham: do you have one? If not, I would imagine this would help flatten the main considering you don't have a backstay adjuster.
Outhaul: does it get tightened for upwind performance and "blown" for the downwind run?
Halyard tension: does the leading edge of the sail have a 'nice' looking entry? Like an airplane wing?
Good point about the skirt being inside the lifelines, if its not, make it get there. Either sheet in, or considering re-locating the car lead tracks to the cabin top.
In higher winds, you can flatten the sails a lot allowing you to point higher. In the light stuff, bear off a touch (like 5* or less) bag the sails a bit, and concentrate on boat speed and avoiding big waves that'll stop you in your tracks.
Once you get sail trim down, read this about a dozen times.
RACING BASICS - Beginner's Racing Manual
I'm pretty spoiled, I bought a boat with a great MORC racing record, even though I can't sail it worth a hoot! Have fun no matter what!