This probably has been asked a million times, so apologies in advanced. But can we log into other instances with our login here for example if I went to lemmy.world and logged in with Designate6361@lemmy.ml should this work? Or do I just need to make an account on their instance as well ? Already know how to browse and comment on other instances but this was interesting me to know if it could be done.
You can use your account to comment and post on communities on other instances. This does NOT mean your login will work on their site.
If you go to https://Lemmy.ml/C/mildlyinfuriating@lemmy.world you are now interacting with a community on that instance. The posts, comments and votes are synchronized across at a server-to-server level and cached in Lemmy.ml
I would get an account on a different instance anyway though, lemmy.ml is overloaded and needs people to spread out to different servers