How can one overcome a state of depression and lack of self-interest, deal with criticism, regain self-confidence, return to prayer and the Quran, and handle unruly children, with the approaching return of the husband and travel to the family?

The summary of the answer is that the cause of the anxiety and sorrow you are experiencing is the heart's distance from Allah. There is no happiness or rectitude except by having Allah as your object of desire and beloved. If you love Allah, anxieties and sorrows will be dispelled from you. The way out of your current state is to turn towards Allah and to fill the heart with His knowledge and love. Allah Almighty says: "Whoever does righteousness, whether male or female, while he is a believer - We will surely cause him to live a good life." (Quran 16:97). At that time, your heart will become strong, and you will trust in Allah, and Allah will place affection for you in the hearts of His saints. You must know your priorities: that you were created for the worship of Allah, the most important of which are prayer and the rights of the husband. As for working outside the home, it is not obligatory, and you will be greatly rewarded for raising children.