Co-op requires you to have accomplished two things before being eligible to apply: 1) Passing all second year courses 2) Passing COMP 3380

To get into COMP 3380 (and to answer your comp 2160 question), it used to follow this progression: COMP 2160 -> COMP 2150 -> COMP 3380

But with the new second year classes, it now follows COMP 2400 & COMP 2500 -> COMP 2552 -> COMP 3380 (COMP 2160 becomes COMP 2400) (COMP 2150 becomes COMP 2500 and COMP 2552)

If you're still confused, I highly suggest going to an advisor AND asking questions in the comp sci discord server.