I'm not familiar with Irish traveller culture, but I know it's nothing like you see on tv.
In general their girls seem to settle down younger than Romany, but that's a loose generalisation.
Religion is mostly Roman Catholic and varies a lot in practice. Almost all take it seriously even if they don't follow religion.
Jobs:
I saw an interesting meme on an activists page that said I am a .....Every profession was listed including Barrister and at the end it said "I am a Romany".
Do you know, it even made me sit up and think. Of course I know what professions my family have, but I'm aware that society doesn't always know. Yes we have pavers
but everything else, too.
As a race we are seeing the value of education much more. Even traditionalists are paying for a tutor for ks3 and GCSE Maths and English.
I don't blame them for not enrolling them in school, it's not the schools or the children but it just doesn't fit.
That said I will argue for education till the end. It took me until my late 30's but I got there.
I must state my leaving school at 14 was not related to Romany culture. As with many children of my time I was bullied for not understanding and being "backward" it was a terrible system of abuse. I'm so glad it's better for children now.
Romany celebrate the dead on xmas eve, generally speaking, loosely again.
Divorce is still quite rare, but does happen and there is also domestic violence, just as any other race, creed, culture.
I myself helped a relative escape from England to Ireland. As to this side of the family I was practically unknown as I married a none Romany.
There were no hard feelings but we just socialised with who we wanted to and they are huge families.