Shrimp and Corn Fritters

Name: Shrimp and Corn Fritters
Ingredients: ¾ cup sour cream; 3 tablespoons lemon juice; 1¼ teaspoons kosher salt, divided, plus more to taste; ¾ cup corn flour, such as Bob's Red Mill; ½ teaspoon baking powder; ½ teaspoon Old Bay seasoning; 1 large egg; 1 cup buttermilk; 4 scallions, thinly sliced; 1 red or green jalapeño, seeded, finely chopped; ½ pound small shrimp, peeled, deveined, coarsely chopped; 1½ cups fresh corn kernels (from about 2 ears of corn); ¾ cup grated cheddar (about 3 ounces); Grapeseed or canola oil (for frying); Lemon wedges (for serving)