DMT will show you stuff that is both beautiful and terrifying, but it will not harm you. The underlying feeling is one of hope and beauty though, once the sheer surprise is over. No one can really prepare you for the extremely crazy imagery and conceptual phenomena. The words are hard to find (But I find it's worth trying). Your first time will probably be either a dud, or a moment of absolute surprise - I mean surprisingly surprising surprise. Then if you want to go again - you won't be so - er -surprised by it all, which is your opportunity to try to relax/observe/interact. Try moving with the energies you feel - your mind and visual field will engage and feedback with you.
After a few more goes at it you might experience continuity between the seperate sessions/hits you have. It's like a kind of dialogue between you and these parts of your mind/imagination/memory that you don't usually get to look at.
Oh and get a turbo gas lighter and a bulb vaporiser, and don't get the flame too close to the bulb - to hot and you will cough your precious spice into the atmosphere.
Good luck, Peace - Pipp