The gap between a gopro and a DSLR in water is pretty steep. I would first practice in a pool nearby to make sure I can get the shots in focus after that go on a real trip somewhere local before attempting a big trip.
It is surprising how many people turn up on a dive site and they have never tested their rig properly in water, so they get very few decent shot and get really frustated
You don't want to be one of them
In terms of location Lembeh is spot on there is no other better place
It is surprising how many people turn up on a dive site and they have never tested their rig properly in water, so they get very few decent shot and get really frustated
You don't want to be one of them
In terms of location Lembeh is spot on there is no other better place