Use Glycerin, Apple Cider Vinegar, or Alcohol to extract the beneficial properties of herbs.
If you cannot take alcohol there is a way to replace the alcohol in a final step called Solvent Exchange. This is covered in another post.
To make a powder from dried herbs grind them up in a coffee bean grinder.
If you are using fresh herbs and/or cut herbs put the alcohol and herbs in the blender and blend to a pulp. Pour this pulp into the glass jars.