By showing your interest in living this experience you are supporting the dream of life of your hosts, on board the crew will be in charge of security, cleanliness, meals and the route. The comfort in a sailboat is different from a hotel or a house, but it has many other advantages that will change the way you see life.
The way you have to participate once on board is very personal, if you want you can always offer to collaborate or ask the curiosities of life at sea, but above all and ideally, you fully rely on the criteria of the crew to propose the route and to stay always curious and respectful with this other way of life, very different from the routines and priorities of life on earth. If you do not understand something, ask! If you have any criticism, talk to your crew! They will do everything possible to accompany you in your adaptation for life at sea.