I'm with Westbrew on this one. Ireland has a wonderful drinking tradition but an awful brewing one. Having chatted with most of the micro brewers in Ireland, I'd be surprised if any of them could afford to pay you a living wage to work for them.
I'm in the final stages of a masters degree in brewing which I took on as a long term study part time, but I don't expect to get a job in a brewery in Ireland, well, not a job that will pay the bills at any rate.
Britain on the other hand has a great many breweries who might be prepared to take on an enthusiastic beginner.