Now you have chosen your transport, it is time to pack your bag. A great place to start is your toiletries. A wooden or bamboo toothbrush with toothpaste or powder that is free from nasties, such as phthalates, parabens, microplastics, SLS, and formaldehyde, and preferably comes in a glass or aluminum container instead of plastic. This of course goes for all your toiletries. Biodegradable soap, shampoo and conditioners do come in bar form and avoid plastic. When you book your stay, find out if they provide this, which will save you some weight in your luggage. Choose a sun lotion that is reef safe, and wear protective clothing. Sit in the shade when possible.
Pack light! No need to bring a lot of clothes, especially when traveling to Indonesia. Your swimmers and an extra pair, so you always have a dry pair. A sarong, this can be a skirt, a dress a shirt, a headscarf and anything else you can think of. When you travel wear your long shirt and trousers, for the unlikely event it is cold during your trip. Lastly, 3 sets of clothes are plenty for an 11 day liveaboard, you probably only wear them during the night.