Lol, I have been there! There are, of course, herbs you can smoke, - I tend to use coltsfoot as a tobacco substitute. The thing is, unless you want to burn your mouth and chest, you need to 'CURE' them.
How to do this - 1 teaspoon of honey in 200ml of water. Heat it until the honey dissolves. Then, spread the herb across a plate, so it's kinda flat. then sprinkle the honey water on it, until it's moist but not soggy.
Over two days or so, turn it, when it's just sligtly sticky to touch, it's ready. I usually mix it wit some tobaco becauase I am a coward !
Anyway, hope I explained that properly. Strange day ^^