Perfect Fish Tacos

Name: Perfect Fish Tacos
Ingredients: 3 tbsp. extra-virgin olive oil; Juice of 1 lime; 2 tsp. chili powder; 1 tsp. paprika; 1/2 tsp. ground cumin; 1/2 tsp. cayenne pepper; 1 1/2 lb. cod (or other flaky white fish); 1/2 tbsp. vegetable oil; Kosher salt; Freshly ground black pepper; 8 corn tortillas; 1 avocado, diced; Lime wedges, for serving; Sour cream, for serving; 1/4 c. mayonnaise; 2 tbsp. freshly chopped cilantro; 1 tbsp. honey; 2 c. shredded purple cabbage; 1 c. corn kernels; 1 jalapeño, minced