We do not inherit the world from our ansestors, we borrow it from our children. -Antoine de Saint Exupéry

None really. The game will walk you through everything through tool tips and help menus.

Just oil and time. Not difficult but possible to over / under cook. You can of course make it fancier with spices and such, but a basic version is pretty low level cooking skill required.

Reference recipient: https://www.bonappetit.com/recipe/garlic-confit-2