From a current student: I had a similar GPA and lower ACT score than you (4.2 and 34 respectively), so I wouldn’t worry too much about grades! Your ECs look pretty strong, although is there anything that you have done or want to do more about regarding literature? Being an EIC of the school lit mag is excellent, but I would look into online literary magazines or opportunities outside of school.
Also a thing about RD is that it does lower your chances to getting in, and if you apply ED II and get in but don’t like the financial package, that’s pretty much the only acceptable reason you can cancel an ED. I would talk more to your counselor about this.