Anybody experienced in underwater photography interested in leading a group to Tioman Island / Sibu Island / Redang Island, sometime late March, after the monsoon season?

Which island is better for tourists who are trying out underwater photography for the first time? Scuba Diving or Snorkeling?

I can settle the vehicle transport from Singapore to the Malaysia jetty (Mersing / Tanjung Leman)and the accommodation. Anybody wants to offer to lead the group and teach a few basic skills?