Shiro will jump right into 2 as good relations with the city is a must and learning all he can about their rules and wishes for outsiders would be good. He'll ask about society, their history if they're willing to talk to him, and well if there is anything organic in the city besides them.

3. He'll explore the city too! As a Lion to fit in at first if they don't look at him weirdly. In normal form, otherwise. Getting a feel for the city itself, what day to day activity looks like, and how its networks operate. Whatever he can find out by exploring that could tell him more about the city, how it works, and if they are in any danger.