How can one improve oneself and build a Muslim family in light of the difficult circumstances mentioned, while inquiring about the permissibility of marrying a woman who does not wear hijab, the place for educating children, and what can be offered to Islam?

What the questioner is going through is a grave matter. The Prophet, peace and blessings be upon him, informed us that a time would come when the one who holds fast to his religion would be like one grasping a burning coal. Allah has promised these individuals a multiplied reward in the Hereafter, and in this world, Allah will grant them His assistance and mercy. Indeed, piety expands a person's affairs and brings a good outcome. Patience comes from Allah commensurate with the tribulation, and victory comes with patience, and relief comes with distress, and with hardship comes ease. Therefore, it is advised to be patient, fear Allah, and anticipate relief, for Allah replaces what one abandons for His sake with something better. It is also important to seek a religious wife who will assist in matters of both religion and worldly life.