The dried green spices will want to separate from the rest of the ingredients. That’s ok, just give it a good stir before using it each time.
Use just like the store-bought seasoning ranch packets.
Adjust to your own tastes. That’s the best thing about making your own. Want more chives? Throw them in there! Want a little less garlic powder, no problem, adjust it down a bit. In other words, adjust it to meet your perfect preferences.
Be sure to store it to where no moisture such as humidity and such can reach it. It may want to clump if so. If you’re worried about it, add one of those preservation packets to your jar.