فَطَفِقْتُ أَجُوبُ طُرُقَاتِهَا
So I began roaming through its streets.
فطفقت conveys beginning an action; أجوب means to traverse or move about; طرقاتها refers to the streets and lanes of Ṣanʿāʾ.
This is a turning point in the opening. The narrator is no longer merely describing deprivation; he is taking action and moving through the city. That movement prepares the next event.