Cherry,
 
I think a guided walking tour will be of great benefit to you so that you know what you are looking at. the Buren is a unique landscape that needs translation and explanation. Here are some tours: 

http://www.burrenwalks.com/
http://homepage.eircom.net/~burrenhillwalks/
http://www.burren-tours.com/
http://www.heartofburrenwalks.com/

You might want to take the ferry across the Shannon and back to avoid Limerick traffic and roadworks. If you decide on a round trip ferry ride - it is called "return fare" in Ireland. 

Michele