Seared Fish Tacos with Mango Salsa for One

Name: Seared Fish Tacos with Mango Salsa for One
Ingredients: 1 medium ripe mango; 1/4 small red onion; 1/2 medium red bell pepper; 1/2 small jalapeño pepper; 1/2 medium lime; 6 sprigs fresh cilantro; 1/4 teaspoon kosher salt; 2 lime wedges, divided; 2 tablespoons sour cream or full-fat plain Greek yogurt; 1 teaspoon hot sauce, such as Cholula or Sriracha; 1/2 medium ripe avocado; 2 to 3 (6-inch) corn or flour tortillas; 1 6 to 7 ounce skinless white fish fillet, such as tilapia, cod, or red snapper; 3/4 teaspoon kosher salt, divided; 1 tablespoon all-purpose flour or cornstarch; 1/8 teaspoon freshly ground black pepper; 1 pinch cayenne pepper; 2 tablespoons vegetable oil