how to find an apartment to rent

my friend is interning in Malta for the summer and is an erasmus fund student. She needs a place to rent but hasn’t had any luck so far. Her budget is pretty low like €600 a month so she can’t find any AirBnB or cheap hotel that looks safe enough. Is there any website that is trusted to find a room/ shared room? She got scammed through facebook marketplace and won’t be able to see the place before she lands. any help?