There are loads of places on the internet to share your love of knitting and to find out what's happening.
Ravelry. Possibly the best knitting site out there. Irish knitters have a strong presence there, with these being some of the better groups:
Probably the most comprehensive Irish group on Ravelry.
Dublin Knit Collective
This group focuses on the Dublin knitting scene.
The Constant Knitter
This group is related to the online store, The Constant Knitter; which is based in Dublin
This Is Knit
This group is related to This Is Knit; a yarn store in Dublin