What should I do to resist laziness and overcome Satan, while feeling apathetic in worship and slothful about Qiyam prayer and supererogatory acts?

The first thing you should seek aid in resisting laziness is by supplicating and turning to Allah Almighty. Then, by bringing to mind the virtue of obedience and the honor of worship, and that the blessings of this world and the Hereafter are contingent upon obeying Allah. What solidifies these meanings is studying books of encouragement, striving against oneself and persevering in performing acts of obedience, accompanying the righteous, studying their biographies, and observing their diligence in obedience.