Yeah, when I first smoked, I kept anxiously waiting for the effects to come on; it was the only thing on my mind. Nothing happened. I smoked a few more times in that mindset, and again, nothing happened. Then one day in high school, I smoked during my lunch break when someone offered me a bowl. I said "Okay, I know it wont do anything, but why not, it wont hurt." Before I knew it, I was in another world. I was amazed that I hadn't felt anything before, because I was fucking ripped. As stated previously, don't worry about it, just chill, relax, and let whatever happens, happen.