Hello from Wisconsin,
14 days is nice length of time. But don't think you have forever. Limit your trip to a quarter of Ireland. Don't try doing coast to coast more than once and back.
If you get to County Clare, a most beautiful county, then this drive along with visiting Ennis is a must.
Use Google maps and follow my directions. This is a really Irish drive. Takes less than hour unless you walk out to the ruin of a castle. Google 'Killinaboy, Ireland'. Once you have that go west on the R476 from Killinaboy to the first right. This small road you have turned onto has a real sharp S curve (that way you know you are on the correct road). Head north. First you pass Parknabinnia on your left. Then Creevagh. Then when the road makes a sharp right ,then left there is a bit of signage for Cahercommaun. This is a ruin from the 4th century. Pay attention to how you walk out there. Look for the grass beaten down by others. Watch for sheep dung.
Head north from here and bear left and you will hit the L1014. Turn left and go to the R480, and turn right. Now you are headed toward Ballyvaughan. You are again headed north and into a more touristed area. Many site have been developed alongthis stretch.
Poulnabrone is the most famous.
A game to play is to take the Irish name for a place and try to pronounce it. Here is the rule. A consonant followed by an H is makes both mostly silent. Think Vaghan, or the word through. Chahir becomes a very soft k, very soft, and is Kahir.
I have spent months in Ireland touring. The coast is what is great. The center of Ireland has its moments but much of it is flat. The Ring of Kerry is not as good as the two pennisulas near it, Dingle and Beara.