Moving abroad for marriage (UK/Ireland) – how do I protect myself & stay independent just in case?

Hi everyone,
I’m a North African woman in my mid-20s, planning to get married in the next year or two to a man living in the UK (we may also live in Ireland, since he holds an Irish passport). Our relationship is healthy and I’ve seen no red flags, but since I’d be leaving my country, family, and community, I want to prepare myself in case things ever went south. I’d rather be safe than sorry.

Here’s what I’ve been thinking about so far:

Support system → I plan to start building a social circle as soon as I move (and maybe now through online groups).

Finances → I’d like to open my own bank account in the UK/Ireland and keep an emergency fund. Should I do this before or after moving? Any banks that are easiest for newcomers?

Education/career → I’m finishing my Master’s in Clinical Psychology at home, and I plan to do a 2nd Master’s in Forensic Psychology in the UK or Ireland (possibly continuing to a PhD). I see this as both a passion and a way to stay independent.

Birth control → My fiancé says he’ll get a vasectomy in the near future, but since I won’t be with him when it happens, I’d like a reliable backup. What methods would you recommend for long-term peace of mind?

I’d love advice from anyone who has moved abroad for marriage or studied in the UK/Ireland. What helped you feel safe, independent, and not trapped if things didn’t work out?

Thanks in advance 💝

TL;DR:
Moving to UK/Ireland for marriage. No red flags but want to be prepared. Looking for advice on: support system, bank account, continuing studies, and backup birth control.