These tips will point you in the direction of some good resources. In your case, some may be helpful and some not so helpful.
1. Maybe someone has already done a good bit of work on your family but you don’t know it. Perhaps a third or fourth cousin you don’t know. Or there might be some people searching the same surname who are not closely related but may have some advice. One way to check that out is my surname page (not ready yet) . Another option is to use Google or some other search engine to find the names that interest you. Be creative in your search terms!
2. There are also mailing lists where you get emails on a topic which could be a surname or an interest such as Irish genealogy or even as local as Co Limerick genealogy. Maillists work by sending a copy of each message to posted to all subscribers. Some lists are very small and some are large.
Generally on lists, it is good practice to subscribe and then just read messages for a week or so before you post. Get a feel for the list. And read the welcome message you get when subscribing. List owners often describe the type things that are allowed and not allowed on their lists. Mail lists are a very powerful way to get your message in front of many people who may be able to help. Learn the types of things that are unacceptable on the list, how people ask questions, etc. Participating on a list is not hard but it’s a good idea to make a good first impression.
Many lists are hosted by Rootsweb. You may want to check out the Rootsweb Maillists. There are 2 search boxes and you can search the archives for a name or term of interest. Or search for a maillist (Find a mailing list) by keyword. The keyword Ireland pulls up about 200 mailing lists out of the 30,000 or so lists at Rootsweb.
3. Message boards are closely related but do not sent you emails. You have to go out and look and them on a website. Your search may turn up links to them.
4. There are also many websites with good information. If you are new to Irish genealogy or just looking for new stuff you might want to check out http://www.jackreidy.com/irish-genealogy/help-with-irish-research/