23 year old student looking for accommodation in paris

With almost one month left to find accomodation, Alin is in the situation to start soon looking for a place to stay in Paris, otherwise he will have to sleep in the park or under a bridge. 

Although I love camping and outdoor activities, sleeping under the clear sky in Paris does not sound right for me. Moreover, I doubt I will be able to bring the tent in the plane, so the only available choice remain finding a collocation, rent, or whatever place has four walls and one roof to cover me from the hot summer sun and the crazy cold winds in the winter. 

I am an easy going guy (I think?). I love cooking, long walks and finding out new stuff (especially new music, art, etc.). In Paris, I will be studying International Security at SciencesPo, so it is possible I will try to bring every now and then stuff on politics and economy. 

In my home country I used to work as a political activist, so I will probably do the same once I get in Paris. Therefore, I will not stay much at home, as I also have a terrible schedule at University. 

I would love to have sociable and nice roomates. If it is not possible, I can also stay with a decent person. The only requirment would be that this/these person/s that would be nice to accept me in their house to have a small degree of responsability (like not forgeting the stove turned on) as well as a preocupation for keeping the house clean. 

I do not mind pets (I LOVE PETS) and I also I do not mind smoking. 

Thank you :)