I'd pronounce is loo-AH-na, with this spelling. (loo-ANN-a would be Louanna for me.)
With the loo-Ah-na pronunciation, I wouldn't say it's tacky or country-ish at all.
One momma namenerdin' in the fleeting quiet moments between
delighting in and losing my mind amidst my four kiddos
To peruse my top 100ish names:
http://www.behindthename.com/pnl/82589Bits of blogging here:
http://jodifriesen.blogspot.ca/And family cuteness here:
https://www.flickr.com/gp/41705