You can mention Mastodon users, but you can't follow them from Lemmy.
They claim to be, but they haven't pubslished any Android builds as of yet.
Isn't Memmy iOS only client?
And I support Mozilla goal of creating something independent, but I also don't like their engine. Everything using Blink is not automatically a bad thing.
They are pointless, just ignore them.
You can already do that. Add instance to the list without logging in and select local/all feeds and you can just browse.
There are a lot of add-ons and userscripts that reformat the links automatically, not sure if or when it's planned to be part of Lemmy.
It works if I search for it on my instance where I'm logged in.
At the top menu bar there should be
Create Communitybutton or you can go to the direct link. If you don't see it then you instance has probably disabled the functionality.