I just started using herbs a couple of years ago and am still adding plants to my garden. Some are for my chickens and I don't have near enough of some of them for both of us
Most herbal sites and books tell you how much is enough to use of the herbs you are interested in.
Most reccmend 1 teaspoon to 1 cup of water for teas.
Burdock grows wild here so I use it.
Plantain also grows wild here. I use it in salves for skin issues.