Rotate the wheel (either left or right) until it says 100, hold it in that position & push X.
Then rotate it the opposite direction until it says 900, hold it in that position & push X.
This means you have 100% movement on a 900° steering (which is the maximum for your wheel).
This game has a soft lock feature, meaning your wheel will only turn as much as the car you are driving allows, (no need to recalibrate).
Make sure steering/brake assist are off so not to interrupt the natural input of your device (while you test your settings/ffb) feel free to use these once you are happy.
Traction control & ABS are ok to use but Stability Control can interfere with your input aswell (while you find a good setup) as it's an electronic driving aid (as in the real world), feel free to use it once you're happy with the feeling of your wheel.
Regarding force feedback, it's a personal choice & all cars feel different so ask again once you've settled in as many here will be able to help.