Just start with softer music and let the headphones relax for 10-30 hours at a lower volume.
Then use ordinary music, pop music (except rock and dance music) at medium volume for 100-200 hours.
Then, use a few classical instruments with rich details to test whether your headphones have a rounded sound in terms of details.
If you now hear that the treble is no longer harsh and has become rounded and natural, the midrange is warm and friendly, and the low frequency is no longer a lump of rumbling, but full of details, then you are basically done.
Hope to adopt.