Study / Moroccan dude wants to study in Poland [4]

Hello every body !!
My name is Hatim 18 years from Morocco, i am in my final year of high school :)

I ve been thinking lately to go complete my superior studies in a foreign country and study in English . I am interested in Quantitative Finance so my obvious option is university of WARSAW of similar colleges who teach finance and applied mathematics !

the problem is ; i dont know any one in Poland so i dont have a clear picture about what should i do or what amount of money i must have to find a place to stay and eat ...!?

Also i want to ask if i can study and work at the same time !!

And thank you for your help in advance :)