I’m confused - if you got denied for Fall 21, how could you get in for Spring 21 (which comes first chronologically)? Do you mean Spring 22?
If you don’t think you can complete the CoE prereqs with strong grades prior to applying, then it might not be the best plan to apply to CoE. I’m not sure if that’s the case but you mentioned you’d have a very rigorous workload trying to do so.