I reckon you are on the right track; the DMT experience is a very personal thing but IME, one consistent hallmark of a decent breakthrough is that it DEFIES ones beliefs and ,for me anyway, suspending all preconceived notions and simply observing works best.Dosage and mindset can allow the same places to be visited again and again, but theres a facet to this compound which is inherently unpredictable, and this is amplified by the mindset one adopts as the experience takes off.You cannot take too much for granted with breakthroughs, but the smoothest way is to just watch without trying to understand the things you witness in terms of your beliefs.
Breakthroughs can be consistently achieved by getting your dose and technique right and, IMO, using one inhalation.When it happens for you, you will know.There is so much more too it than the visuals you describe and Im sure with a little practise you can get there.The magic is in the CEVs during a breakthrough where the boundary between you and the experience becomes lost.
I am paranoid of my brain. It thinks all the time, even when I'm asleep. My thoughts assail me. Murderous lechers they are. Thought is the assassin of thought. Like a man stabbing himself with one hand while the other hand tries to stop the blade. Like an explosion that destroys the detonator. I am paranoid of my brain. It makes me unsettled and ill at ease. Makes me chase my tail, freezes my eyes and shuts me down. Watches me. Eats my head. It destroys me.