I am the president of a club that I want to disband. Can I take orchid island, my coins, diamonds etc.?

To disband, go to the member list and remove each officer or member individually, then click on the 3 dots. Alternatively, you can promote an officer (green button next to their name) to take your position, then you can leave the club using the 3 dots. Either way, your Orchid Island and your possessions will remain intact.