Easy Catfish Tacos With Slaw

Name: Easy Catfish Tacos With Slaw
Ingredients: 1 pound skinless catfish fillets, cut into 16 pieces; .75 cup whole buttermilk; .5 cup fine yellow cornmeal; .5 cup panko (Japanese-style breadcrumbs); 2 tablespoons Cajun seasoning (such as Slap Ya Mama); .75 teaspoon kosher salt, divided; .25 cup mayonnaise; 2 tablespoons fresh lime juice (from 1 lime); .25 teaspoon black pepper; 2 cups shredded napa or green cabbage (from 1 small cabbage); 8 (6-inch) yellow corn tortillas, warmed; 2 radishes, cut into matchsticks (¼ cup); 1 ripe avocado, thinly sliced; 2 tablespoons fresh cilantro leaves; 2 tablespoons minced fresh chives; Lime wedges; Hot sauce