19 year old girl looking for an apartment in Helsinki Center

Hello. My name is Vitoria. I'm from Brazil. I'm going to Helsinki - FI to study psychology for a period of 6 months, from the beginning of August to the end of January. I would like to rent an apartment or shared or studio for a long term and I would like stay in the Center of Helsinki. Im organized, clean, patient and really understanding. I hope I can find someone who is renting an apartment in the center or the nearest possible. If you are that person, please contact me.