Not to worry, DublinFemale, here's what Citizen's Information says about polling cards:
You do not need your polling card to vote.
However, you do need to bring identification.
If you did not get a polling card, you can find your polling station on your local authority's website.
Voting in a general election
There's lots of info on that website [Citizens' Information] and the Electoral Commision's website about making sure your name is on the register and how to vote and how the votes are counted etc. It's there all year round, not just before elections.
Ireland's Statutory, Independent Electoral Commission
The TV ads encouraging people to register and vote are very funny, I love the holiday in the Antarctic one😂 I like that they used humour to get the message across about how to make sure you can vote, instead of some bland grey public service announcement that people mightn't notice, or pay attention to.
I saw this interesting article about strategic voting, but I'm not sure I understood it all!
Here it is for people with more subtle brains than mine
Why it pays to vote all the way down the ballot paper – The Irish Times