How to fix it yourself home button is broken?

I suggest to take it to an Apple Authorized Service to be repaired.

If you are at all the Home button does not work, try turning Assistive Touch to still get the Home button functionality on the iOS screen. Many iOS users turn on the feature to minimize damage to the Home button.

Go to Settings> General> Accessibility> AssistiveTouch and turn on the feature.
Once turned on, you will see a transparent button on the screen that can mimic the functions of the Home and other gesture.