Advice Advice for My First Solo Trip to Ireland

Hi folks! I'm 26M and planning my first solo trip to Ireland in January 2025. I'm really excited but also a bit nervous. I have a few days to explore, and I'm wondering what are the must-see places for a first-timer like me? Should I focus on Dublin, or are there other areas worth visiting? Also, any tips on local food, transport, or cultural experiences would be greatly appreciated. Thanks in advance for your help!