I suggest you start doing courses ..... do your day
skipper course in Moreton Bay first ... split the practical into 3 + 2 days on board the
monohull if you are worried. Southern Cross
school did a good course when I did it. You first learn about sailing and
navigation .... you don't need to be on a cat. If you do it in
winter, that boat will feel snug and not too cramped.
Then suggest you
head down to Royal QLD Yacht Club (on Wednesday afternoons or other
race days) and start volunteering as crew. Ask the friendly
race coordinators to try and put you on cats / introduce you to cat owners who may invite you out next time. You can
email the coordinators in advance. Always take afternoon tea for the whole boat if you want to make an extra good impression.
Then
Bareboat charter a cat by yourselves to see if you like it .... before you commit and sell / buy anything. Not all couples like it. I believe there is one
Seawind for
bareboat charter in Moreton Bay if Whitsundays is too far or hard.
Once you have some experiences, post messages on this forum and you will find a number of local cat owners who can show you their boats and teach you the secret cat owners handshake.
Good luck.