Three 21 student girls looking for accommodation in Dublin

We are studying biothecnolog in Zaragoza (Spain), it's our last schoolyear. We are good and serious  students so that our priotity is to pass the course and to learn lots of English. We would like to achieve at least a C1 level in that language.. We like going out in our free time and meeting people from other countries. We are looking for a 3 bedroom accommodation near Trinity College (walking distance). We would like to have a desk in every bedrrom. No smoking, no pets