If you can wait a bit you can get sync for lemmy.

Pacman!

In order to subscribe to another instances communities you still need to be on your community. For example if you click a link that takes you to https://lemmy.ml/c/announcements it will take you to lemmy.ml where you are not logged in, however if you click on the community name is a post that shows up in your feed, you will browse that community FROM lemmy.world.

You could also browse like this:

https://lemmy.world/c/announcements@lemmy.ml

I completely agree. I can suggest this instance and know that most people will find a place and have a similar experience.