This link will help explain migrating from Reddit and what instances are and how they work independently and simultaneously at the same time. You don’t have to create an account for every instance. You can follow another instance as a guest, you just won’t be able to interact with any comments or upvoting/downvoting. Think of them as separate websites under the same platform that can all coexist independently but still interact with each other. But this helped me out a bunch! https://github.com/amirzaidi/lemmy
Is there an iPad version of Memmy? I use Android for my phone, but I do have an iPad Pro that I occasionally use.