Thoughts include that you'd be killing two birds with one stone:
- In addition to you undertaking the grad school program which may end your self-described underachievement...
- Ireland will provide enrichment in the form of cultural immersion/awareness as well as the experience of whatever academic program you may decide on for your child.

This sounds like a win-win.

From the brief amount of information in your post it is difficult to give personally tailored advice. However, speaking in generalities: If you are getting cold feet for any other reason (such as experiencing a well-timed case of gifted "imposter syndrome" which is causing you to doubt whether you can actually accomplish the opportunity which is front of you), then you may subconsciously be focusing on your daughter as a means of not facing the grad school challenge and seeing it through.