How can one restore the soundness of the heart and the family together after straying from the path of guidance due to pressure from those around them?

Do not despair of Allah's mercy, no matter how great your sins, for the door of repentance is open, as Allah Almighty says: "Say, 'O My servants who have transgressed against themselves [by sinning], do not despair of the mercy of Allah. Indeed, Allah forgives all sins. Indeed, it is He who is the Forgiving, the Merciful.'" And do not obey anyone in disobedience to the Creator, for "there is no obedience to a creature in disobedience to the Creator."