I echo Wintersun - personally I would not start out by buying the stabilisers unless you are really nervous about risking a capsize (e.g. due to cold water, sharks, inability to get back on board or w.h.y.). For my money a boat which doesn't lean (i.e. a trimaran) seriously detracts from the sailing experience, plus the outriggers add more weight & drag which you can well do without: these boats are already slow enough under sail.
The big "must-do" set up is to invest in some micro pulley-blocks of good quality to lead the sheet (the rope you use to pull in the sail or let it out) through as these will let the line run very much more freely to instantly depower the sail if you get hit by an unexpected gust (a major cause of capsize on these boats). There are plenty of posts from me and lots of others on these forums about how best to set your boat up if you do a bit of digging.
Then read a how to sail book or two before, on a warm (water) day with light consistent breezes, going out to... well, "learn the ropes" as they say
My feeling is that unlike a bike, if you start with stabilisers you will probably never take them off and for my money (i.e. me sailing in the conditions I find on my doorstep; not necessarily a blanket assertion) the extra difficulty of learning to sail without outriggers will be repaid in the future through a more challenging, interesting and engaging sailing experience over the long term... As long as you have enough light wind days to be able to enjoy the experience: if the winds in your area are strong enough to consistently push your boundaries as regards making your boat lean and you feel unstable/at risk when you sail, then clearly outriggers are probably more justifiable than I find them where I live/sail... but there is also an argument that a lot of it is down to skill, knowing the limits that your boat can take and applying your skill at/near those limits, and your own personal willingness to accept an overcome certain levels of risk.
As long as you sail within sensible limits dictated by your abilities and the conditions - and assuming that you get a reasonable number of days on which the conditions are light enough - you may well find, in the long term, that outriggers are not really as essential as you originally thought they were.