Fiji 2026 with toddler

Hi all
I’m looking to take my wife & 2yr old to Fiji in July 2026, wondering on the best way to do so?
I have:
~650,000 velocity points
~175,000 Amex points

Is it best to use Amex points for hotels and velocity for flights? I presume I’ll have to fly via BNE? (I’m SYD based). Is it worth booking business on such a short flight and with a toddler?
Any suggestions on hotels good for 2yr old?

Never been to Fiji so this is all new to me, any/ all suggestions welcome!

Thanks!