How can I return to my previous commitment, energize myself to perform good deeds, fortify myself against looking at immodestly dressed women, and become strong enough for Fajr prayer, night vigil, and daytime fasting, given that I have many expiations for oaths (kaffarat yameen) to fulfill, and how can I motivate myself to seek knowledge and read the Qur’an?

You must realize the poorness of your state and hasten to sincere repentance, through remorse, seeking forgiveness, abandoning sins, and resolving never to return to them. Seek help from Allah, follow a bad deed with a good one, observe the obligatory duties, seek righteous company, and turn to the Book of Allah. As for the oaths you cannot count, you must expiate what you predominantly believe will absolve your responsibility.