Setting up Eizo CG 318 for grading

Hi, I grade with an Eizo CG 318 monitor. I'm from a stills background so for Photoshop I just do a self calibration and it comes up on the color mode. Also in color mode there is Rec 709 and Rec 2020. I usually work in Rec 709 in Davinci. Should I be selecting the Rec 709 color mode on my Eizo? If I do then surely it won't be calibrated.. I'm calibrating using the built in sensor and I just run the self calibration and I'm connected via the USB C type cable.