20 years old French girl, looking for accommodation in Stockholm

Hey, my name is Laurie and i'm from Paris. I'll start studying Business Administration and Political Science at Stockholm university late august. I'm searching for a studio, shared flat or any nice place to stay downtown (no suburbs) from 1 to 3 years :) I've never been a roommate before but i'm a nice, organised yet easy-going person and i'm sure i could totally fit in!! I like going out, (most of the time even more chilling at home) and i'm trying to get myself into sports but it's harder than i imagined and now i have a gym account that i'm not using... So i'm here to find a place to live by myself or an accommodation with funny people to stay!