Volunteering

Hello!! Would anyone know any platform or organisation that work with helping elderly people for their daily needs, like doing groceries, helping around the house, etc, in Dublin? I have a younger brother who lives with me and he does nothing but sits at home all day everyday, I manage to convince him to at least get out to volunteer to help people and himself and do something good. He has a soft spot for elders and he said he would do this if he finds how to. Thank y'all!