I am a newbie as well, so disregard this if you wish,

I think it depends on what you are looking for; your purpose for experimenting with psychedelics

Have you read the Doors of Perception?(If you haven't, I suggest it, it's excellent, and you can find a pdf in the files section of this site) If you are looking to expand your perception and consciousness, since that seems to be a common purpose with DMT, peyote would be an excellent one to get acquainted with.

I have experienced LSD, and it really helped me connect with my right-brain.. I'm generally a left brained thinker, straight line, geometric shapes, mathematics, etc.. I always struggled with creativity, be it art or writing. Using LSD, I was able to better connect myself with my right brain. Not that it suddenly gave me ideas for a best selling novel, or an artwork worth billions of dollars, but that I was able to understand the flow of contour lines that my mind normally breaks up and calculates.

Wow that was a lot harder to try to explain than I thought, haha.. I still don't think I described it correctly, but it's the general idea I was trying to get across, so, yeah. Of course, it's still different for everyone, but I thought I'd try to give you a basic idea of how they might affect you differently. So don't really choose one per se, you should try them and see which one captures your fancy!

On a side note, I didn't include mushrooms, because they haven't really done anything for me except make rolling around on wet grass feel REALLY GOOD! lol