It's great to hear you are planning to visit Ireland.
Negative tests are now required to travel to Ireland. If you are vaccinated you will need either a PCR test taken 72 hours before arriving in Ireland or an Antigen test taken 48 hours before arriving. If you are not vaccinated, a PCR test is the only option. After checking online, I see you can get tested at various pharmacies around the country, such as CVS, Walgreens, and Rite Aid. However, remember you need to ask for a certificate stating you tested negative to travel to show at the airport.
You can read more about the new requirements for travel on our Traveler's Health
page and the Ireland Government's website
Wishing you safe travels,