As for the side quests, the Joy quest can be continued by simply going back to the Safehouse apartment building. She's waiting outside the apartment door. For the pizzas, there's 3 in middle square, 2 in the housing block (one is inside a house), 3 in the East part of the Living District, 1 next to The Arena Guild, 1 inside one of the apartments next to the safehouse. The one inside the apartment and house are probably the easiest to miss.