The series has been dropped by the mangaka. Everything that exists has been scanlated and now 3 years later it's kinda doubtful it will get a continuation.

Why wait? To read it in order? Not really worth it, Yuru Yuri doesn't have any continuity to speak off, you can jump in anywhere.

No, they are scanlating in reverse order. Why is detailed in their FAQ.

YY scanlation is pretty much on track actually, http://bakkinbakkingamu.com/