u/Vistrez

I 18(m) am soon be going to college and other things and i have made a huge and terrible mistake of using my old email with a VERY cringe address and affiliated with many bad apps and much bad digital footprint in various official forms and competetige exam forms and many other official things and im a dumbfuck who should have obviously used a new one which ive created now and now i want to change it and heard abt the new feature abt changing username but ig it hasnt reached my gmail plzz help me how do i change all of it