Oh you have pics of them!!
Those gawky adolescent geese never look all that good . . . these guys look rough but ALSO well enough that they should respond to your TLC quickly.
I get the "bright eyes and smiling faces" . The corner of thier "lips" lol does curve upward in a "smile" all the time, but the real smile is in their eyes. Mine sort of squint and look at me with one eye and murmur (well, they are still peeping at this point) happily when I bend over their playpen.
Maybe mix up a waterer with an electrolyte solution, and give them a few days of chick starter for increased protein to build up their unused muscles. They shouldn't have high protein for more than a week or so, due to their blood feathers coming in about now and the possibility of angel wing (a diet too high in protein causes this).
They don't need much in terms of "shelter" from the weather or elements. A three sided southern facing enclosure should be fine. They need SAFETY, so predator proof enclosure is the most important. At least until they are older, Embdens I hear are HUGE birds capable of intimidating larger critters.
Finally, (if you have the time
) just sit near them and let them see that you just sit there and aren't interested in attacking them. That you bring food and water is also something they will realize and forgive you for being huge and monstrous for