If you want to try again and no one else is on, we have plenty of cake in Fenris Station (where you spawn when you warp to the Fenris), and right down the path from spawn proper, there's a sign pointing to a food dispenser. There should also be an old melon farm right behind spawn, and whatever food is in the storehouse.
As for getting in the Fenris, the whole entryway has been moved up, but it looks like someone built a ladder up to it. Facing the Fenris, follow the path to the left and up the steps, then climb the long ladder, and you'll hit the airlock.