Coming to Dublin in August

Hey guys, I am coming to Dublin in august for my masters. I am pretty excited to start a new phase in my life. I was told to join communities on reddit and ask my doubts, so it's just been a few days since I am on reddit. I have heard a lot that people in Ireland are very friendly and welcoming to international people but some of them don't like people moving to their country. I just want some international experience and will go back to my home country after my studies. Just want any advice or something like what to do, what to avoid and if there is something I need to know please share it.