Calea is hit and miss with most people... it's not that "instantly" you'll recieve dreams, it's something you have to work for. The first step is learning about lucid dreaming, a.k.a. "waking dreaming", it's where you are actually aware of your dream and somewhat in charge of its direction. You can't just take Calea and expect to start having amazing dreams, it's more of a dream aid. Tried the tea... it was so sick i almost vomitted instantly. I prefer to smoke a mix of calea/blue lotus before bed. Don't bother using Calea when you're awake, the effects are slim to none. Just smoke a J or 2 of the material before bed and enter into a calm sleep and let the dreams take hold. It's also something you usually have to build up, the first ten times might not be anything but then you'll eventually start having very lucid dreams.

P.S. - Calea is a great catalyst for other entheogens! Using calea with almost any other substance enhances its effects!