Easiest Shrimp Salad!

Name: Easiest Shrimp Salad!
Prep time: 15 min
Cook time: 5 min
Total time: 20 min
Cuisine: American, World Cuisine
Ingredients: 3 lemons; 1/4 cup diced red onion; 1 pound shrimp, deveined; 1/4 cup mayonnaise; 2 tablespoons extra-virgin olive oil; 1/2 cup sliced celery; 1/4 cup chopped combination of dill, parsley and cilantro; salt and pepper to taste; ripe avocado