I would recommend perhaps applying for one ambitious choice, three more secure/good choices, and one lower entry requirements that is more guaranteed for you (as suggested above!) It's good to have this spread to ensure you have lots of options and you have something to aim for in your exams too with an ambitious choice!
Best of luck with your application and exams, and if you have any questions about university in general, please feel free to let me know! 🙂
-Alfie, University of Plymouth Student Ambassador