EU citizen with UK PGDL considering qualifying and training in Ireland

Hello, I'm an EU citizen, hold an LL.M from the University of Edinburgh and recently completed the UK PGDL. For visa reasons and my interest in AI regulation/liability, I'm considering qualifying in Ireland rather than in the UK. I'd greatly appreciate any advice regarding my questions below! Many thanks in advance!

• Any recommendations on which 4 subjects would be easier to sit first for the FE-1 when coming from a UK law background?
• Are international applicants (with EU citizenship) looking for TCs at any disadvantage compared to Irish candidates when applying to international firms or boutique firms?
• Do most firms provide trainees with a salary during the PPC or just cover course fees?
• Do trainee solicitor roles exist in-house or are in-house roles really only reserved for solicitors with 1+ years of qualifying experience?