Your chances are excellent to get an internship in Ireland. Talk to students in the years above you, there has not been issues with spots if you hold an EU passport.
Asking whether its easier than getting residency in North America tells me you may not be familiar with the process. To get an internship in Ireland in your position you just complete medical school and fill out a 2 page application and its pretty much guaranteed. No exams, no interviews, nothing.
To get residency in North America you have to complete and score competitively on the USMLEs, MCCs, complete overseas electives, secure reference letters, apply to hundred of programs, fly to North America several times for interviews and even then its not guaranteed.
Keep in mind that the concept of "residency" does not exist outside of North America. If you are going for family medicine lets say, then once you secure your residency spot, its a set 2 year (Canada) or 3 year (USA) training program with progression through without having to re-apply in between years. In Ireland, the UK, Australia etc. you have "training schemes". To be a GP in Ireland, you do your intern year, then you need to apply for an be accepted for the GP training scheme which is 5 years long (so 6 years total). If you don't get in, then you need to apply for SHO jobs and apply again. Progression never guaranteed, you may be stuck at one point of the training scheme.
Bottom line is, if your goal is to remain in Ireland, you are golden.