Yeah, lots of lousy forums on the interwebs.  Kids typing about how much they love oxy, inhalants, dangerous advice, and just all around endorsing unhealthy life choices.

Which schools/authors of Buddhism are you studying?

There are plenty of threads on how to smoke spice in the forums, let us know if that model of vaporizer works for you. 

As far as determinig if DMT you purchased is real, let me note that this problem is one part of the reason to not condone purchasing/selling in the first place---- members here do not believe that anyone should be doing this. 

For your first time just remember to start with a low dose and remember that it is safe, and that you are safe.  My favorite setting is a warm bedroom with a couple good friends, low lights or night.