The next ISAF WC event is only two weeks away btw (April 20-27):
http://www.sailing.org/worldcup/events/Hyeres-2013.php

The next official event after that is Qingdao, China (October) although somehow I doubt many Euro teams will make their way over there.

If you are a talented sailor making the transition from any other class to multis will be doable, especially when paired with either an experienced multi helm or crew.
The female helm currently at the top of the leaderboard has only been sailing on cats for about 6 months now, the second Dutch female helm for not much longer
and is currently 4th which proves that you dont necesarilly have to be a "born" catsailor to be succesful.