Ireland is one of the hardest places to do genealogy in Western Europe.
Catholic church records typically go back no further than 1828, except in the eastern urban areas. Persecution of Catholics made it dangerous to keep lists of baptisms and marriages.
In 1922, during the Irish civil war, the 1831-1851 censuses, many Anglican records and most wills were destroyed in a fire. The 1861-1891 censuses had already been destroyed deliberately.
Some records that may survive for your family:
1. The Registry of Deeds, which records transactions involving land. But it was a voluntary system, and generally the poor did not record their transactions in the Registry. See https://irishdeedsindex.net/index.php and also https://familysearch.org/search/catalog/185720
2. Cemeteries. Check websites such as Billiongraves and local genealogical societies and websites.