The Session is a superb Irish traditional music forum and treasure trove of tunes, and very friendly and welcoming.
You may also want to look at Mad for Trad which has a bouzouki tutorial available on CD by Gerry McKee which is very good. It is in GDAE but there are GDAD chords too and is easy to follow whichever tuning you choose.
I personally tune to GDAD because it's better for accompanying Irish tunes but playing tunes becomes tricky for a sausage-fingered chap like me.