Hi Speirbhean
From what I know it is difficult to have a child enrolled in Scoil Mobhi. It's not necessary to live in the parish to obtain a place there. I know of pupils who do not live within the parish or locality. It does seem to help however, if there is a sibling there already, or if one has connections with the school through family relations having previously attended the school These are my observations. I don't know whether or not having Irish would help, as many children who start in infant classes would not have Irish. However, it certainly wouldn't militate against the child. Having said all that, to the best of my knowledge and having attended various fund raising functions there I believe it to be a good school.
Hope this helps and good luck with your search.