G'Day Caroline and family
Good to have you as new members of CF. I endorse your general plan, but add my vote to not being too adamant about a specific marque of vessel. There are lots of fairly similar boats out there in the marketplace, and for someone just starting out in the cruising/liveaboard world the differences are kinda academic. Once you have a few years experience a more exacting choice becomes supportable.
At any rate, Ann and I wish you the joy of a new boat and a new life.