I tried to subscribe their, but it says I’m not logged in, and I have a feeling I’m not grasping how this works. I assumed because I am logged in on lemmy.world that when I click subscribe I was already logged in, but apparently not. Am I supposed to create a new account for each instance or each subscription or is there another way to do this?

Same, had to install another Lemmy app after Jerboa effed up this morning, Liftoff is quite nice, definitely usable and worth the install.