OK, yes you can learn a lot by trial and error - there will be a lot of error at first, so why not skip all the anguish and white knuckle time and get a teacher. A couple of days on the water with an experienced sailor will do wonders for your confidence.
Even better, if you intend on taking friends and family with you and would like them to sail with you more than once, you should take a keelboat course from a recognized sailing school.
Of course, In the meantime you can learn a lot by asking questions and spending time in the archives. Also, since the H260 is just the big brother to the H23.5 you can learn a lot by spending time at this link:
http://h260.com
THIS IS THE MOST IMPORTANT THING YOU'LL LEARN:
ALWAYS BE READY TO RELEASE THE MAINSHEET INSTANTLY!!!
On this boat, the power is in the mainsail so be ready for gusts - this has nothing to do with being "tippy" it just means that until you get more experience you'll find that the boat has mind of it's own when overpowered.
Sorry about the yelling, but we often hear inexperienced sailors (and others that should know better) attribute the sudden heeling of the boat to the fact that the 23.5 is a water ballast design. Nothing could be further from the truth. I've sailed my boat in 30mph winds with very little heeling - it's how you control the main, and to some degree the jib. That's where learning about sail trim comes in. The tip about Don's book is a good one - I learned a lot from him.