Here are some useful links :-

Road Safety Authority – http://www.rsa.ie/en/
Rules of the Road – http://www.rsa.ie/en/RSA/Learner-Drivers/Safe-Driving1/Rules-of-the-Road/
Applying for your test – http://www.rsa.ie/en/RSA/Learner-Drivers/The-Driving-Test/Apply-online/