Will you use any of these variants?

1)
Thread 'Guide on how to create an anchor point for full suspension hanging using only a dumbbell'
2)
Second variant option, door + dumbbell
Can you write us more about what procedure you have planned?
Have you tested your rope? (It must withstand all your weight) Is the chosen door firm and strong? What object will you use as an "anchor" to tie the free end of the rope to?
Just reading the information provided, the general advice that comes to mind is...
To achieve unconsciousness, the position of the ligature and knot will be essential to block the carotid arteries and oxygenated blood supply to the brain.
A self-tightening knot is best (e.g., the Noose knot with stopper knot, also known as Arbor Knot). The knot should be placed behind the neck in the center.
The ligature (rope around the neck) should be placed under the jaw. More or less at the height of the Hyoid Bone, which is above of the Adam's apple (laryngeal prominence). It is the softest area of the neck and where the rope will most easily penetrate and compress the arteries.
'How to locate the carotid arteries?