Add the avocado oil to a large frying pan, and heat to medium. Drop in 2 to 3 popcorn kernels, and put the lid on. After about 4 to 5 minutes, the popcorn kernels should pop. Remove the pan from heat and pour in the remaining kernels.
Put the lid back on, and keep the heat on medium, until all the kernels have popped. Shake the pan around every few minutes. The kernels should all be popped in about 8 minutes.
In a small bowl, combine the dill, garlic granules, onion granules, salt, and pepper.
Pour the kernels into a large bowl, and spray with cooking spray. Toss in some of the ranch seasoning, and mix with your hands. Spray a little more, and add in the rest of the seasoning. Toss, and serve the popcorn.