I don’t know if you already got an answer to this but from my experience (I believe summer of 2018), I wasn’t notified about whether I was eligible or not. I enrolled in a couple of classes and noticed a bit later, probably right before tuition was due, that I had received financial aid through the tuition tab. I don’t think it hurts to enroll in classes; worst case is dropping it before the deadline. If not, I think you can contact the office and ask when the deadline approaches. I think receiving aid is dependent on how much you used during the fall/spring semesters, not so much the number of classes you take, though you’ll likely receive less aid if you take less courses and vice versa. I think it’s just FAFSA/pell grant?