Catia

Hello,
At the beginning of the school year, I am going back to DUT GMP and I would like to acquire Catia. I would first like to know what configuration is needed to run Catia optimally. And then I would like to know what is the duration of the acquisition of Catia that is to say if once pay it is for an unlimited duration or if it is only during the duration of studies or a certain number of months .
Thank you in advance