I learned to sail on Hobie 16's. When I switched to mono hulls there were a few surprises. Like stated above tacking a beach cat can be a bear. Also, watch the leeward bow, especialy when reaching. If you stuff the bow the boat will stop suddenly. If it is windy enough to fly a hull I find for newbies it is best to use the main sheet to depower instead of pointing higher. The cats do not need a boom vang since the main travel is so long. The main sheet acts like a vang. If the cat does have a main traveler and it works well I find you get much better sail control using it rather than the sheet. You will also find that the apparent wind is always very close on the bows once you get going. It will seem like you are always sheeted all the way in.
Here is how I would tack my H16 and my H18.
1) Fall off slightly to get more boat speed.
2) Have the crew get into the center of the tramp and lay down to avoid being hit by the boom
3) Smoothly move the rudder to head up and through the wind. The rudder should not be deflected more than 45deg or you will stop the boat and get into irons.
4a) right before you turn through the wind, toss the tiller behind the boat and use the rudder crossbar to control the rudders. The main sheet will get in the way of the tiller extention.
4b) Get to the center of the tramp and duck while still holding the rudders
5) Keep the jib
backwinded until the main battens "pop" across. You will know what I mean the first time you try it.
6) If solo or with non-contributing crew, sheet out the main about 12-18 inches, then tack the jib
. If the crew is helping, do both at the same time.
7) As your speed increases trim sails as necessary.
If you blow the tack and get stuck in irons, you can still complete it.
1) sail the boat backwards fast enough so you get rudder athourity.
2) keep the jib
backwinded, it will help push your bows around.
3) keep the main on the inteded leeward side, but make sure it is not sheeted in tight.
4) as soon as the boat can be truned off the wind do so and tack the jib
1) The main sail is what gives the boat most of its power. So, I usually set the jib for the point of sail and forget it until a tack or gybe.
2) Look at the hull shape on the beach. If the hulls have lots of rocker, when tacking keep your weight over the lowest point of of the hulls. It will help the boat turn better. If very little rocker or no rocker, keep your weight as far aft as possible since the boat will try to pivot around the rudders. Most resort cats do not have dagger boards.
3) Things happend much faster in cats. give yourself plenty of room until you get used to the boat.
4) Don't worry about capsizing. It's part of the fun. Remember, if it is windy enough to capsize it is windy enough for you to right the boat.
If you have any more questions, please feel free to PM. If you do, please tell me the type of cat so I can give you more specific info on how they sail.