Yes, you should register so the courses and sections of the courses you want to take do not fill up. if you have to cancel enrollment, or decide to cancel enrollment, you can usually do that up until the first day of classes. Check the academic calendar of the college or university.
Your GPA is above 2. 000000, so you ate not an academic probation. Depending on the policies of the college and degree program, you can and may have to retake the English class the next time it is offered.
Every college and university and degree program is different. That is WHY you have to talk to or contact one or more academic advisers before classes begin.
The sooner you do this, the better. When I went back to graduate school it was a little over 2 weeks until fall classes started, but I knew WHO I needed to talk to, and even though I had not met the professor before, he obviously knew my history. I was his last graduate student and I knew what kind of thesis I wanted to do. He asked me if I had
a particular study area in mind. My answer was no. The cool thing about remote sensing is satellite and aerial images are available. I was accepted back into graduate school.