There should be slight effects from 10mg vaped, 20mg and everything stands out, colours are more pronounced,
30mg and there is a pronounced meditational state
50-60mg and there is a profound medicinal healing entrance into the DMT Realm, which will grab you by the bollocks or the guts whatever, and give you the experience of DMT proper. There will be nothing to navel gaze about. You will be thrust into a graphically visual and audio area of consciousness of which you were only vaguely ever aware in the deepest recesses of your brain. Your body will take on a healing quality in the process of accepting what you are shown whilst your trip to the Realm lasts for three minutes. The descent is as smooth and everlasting as can be. There is no high exactly, just a passport to another realm for a very short time with an opportunity for assisted healing. NB If you struggle to accept what is there to be found you are unlikely to experience any of the beneficial effects.
I think the smell of DMT is flowery and sweet, personally. I am sure it pays to vape the crystals at the lowest temperature to keep the taste good, but that is my experience of root bark DMT which I would expect to be sweet tasting just because it does and there are sugars in the root bark. I have yet to try other sources of DMT. The crystal powder ranges from white to cream to pale yellow to peachy orange in my experience. The colour reflects the age but the effects are the same.
Without extracting your own I would recommend sourcing from somebody you can trust and then incrementally increasing your vaping amounts until you are ready to enter the realm with the larger dosing...