Great one, love the astetics and gameplay.

Only confusing part is healing, I don't know my health or how much healing I need to be back to 80% or something close so I can get back into battle.

Also healing takes forever.

It looks like you can't just sit there and heal (or it takes an enormous amount of time to do so) without first taking over an island. So once you get hurt down to nothing, you need to sail around looking for castaways, which heal your ship.