Well, there are pros and cons about the shortness of DMT. Because the come up is so fast, it can be quite confusing. With a long lasting substance like LSD or mushrooms you have plenty of time to get to know the feeling during the trip, and build a relationship to the molecule. In my experience, if people treat a substance with respect, the first trip is basically a free ticket for a stunningly beautiful trip (which doesnt mean, that it wont be overwhelming ;)

If you consider trying DMT, I might even suggest doing so in the form of Changa, which adds Harmalas, that prolong the experience from 5-10 minutes.
If you go for DMT, start small, that way it wont be overwhelming but youll already get a feel for the tryptamine space. You can dive in as often as you want, no need to rush.

Well if you do, maybe you can write a report on here ;)