If you really want to discover Ireland in freedom you should consider getting a rental car in Ireland. While the public transport will take you around the country in comfort, you will need a car to see the real Ireland at your own pace. As well as the independence it gives you, it can also work out cheaper too, especially if you are travelling in a group.
However, there are some basic things you should know about renting a car and driving in Ireland. For the most part, you will need to be between the ages of 21 and 70 to rent a car in Ireland. You may find a car hire company that will rent you a car if you are outside this age group, but expect to pay more. You will also need to hold a full, clean driving license in your country.
Ireland can get very busy, especially in the summer months so you will get a much better deal if you book early and online. All reputable will have websites where you can book rental cars in Ireland in advance.
There are some also some basic rules for driving in Ireland that you should keep in mind. Remember that you must drive on the left at all times and that you, and your passengers, must always wear seat belts. In general, speed limits in Ireland are as follows: 40-60kph in urban areas, depending on the location; 80/100kph on secondary and primary roads respectively; and 120 on motorways.
In general, road signs and markings are very clear so follow them closely. You will need to pay for parking in towns and cities during business hours, and remember to never, ever drink and drive.