Changing decision plan after applying

Hi I just submitted my application for U Chicago EA. However, I realize it might be a better choice to do ED1 for the November 1st deadline. Can I change this after I have submitted my app? Does admission read applications right away or do they always wait until November 1st. I am a recruited athlete but I think ED will guarantee my spot and EA might make the admission feel I am not that interested. I think they give likely letters so I am assuming they read athletes applications first?

Thanks for your help in advance

Contact the school to see how you can change it. You may need an update with a signed ED agreement from your parents and GC.