A person will not be fully ready for such an experience, ever. The reason for this unpreparedness:
a human is not an evolutionary endpoint. But based on my answer, one can understand which laws served as the basis for the preparatory techniques: with consideration of the physical body, the non-materialbodies, sleep and awaken state, life, death, love, and etc.
After the raising of kundalini the human returns from the other world — this is a return after death. He retains the path of knowledge of the subtle/thin worlds... And then, for the nth number of years, all of the human organs, as in the example with the elbow, are "ringing through" — they stop and start anew. Thus, only based on the inner knowledge of the energy connection between life and death, the inhalation and the exhalation, sleep and awaken state, non-material bodies, the organs etc. the real methods can be developed. And this is possible only if meditative consciousness has been manifested. All the rest — are exercises with an esoteric slant, in general, creative eccentricities.
The masters, who really know that everything is not so simple, replace the harsh methods by the Ritual — a direct Path. Practice HORA is a total natural evolutionary advancement of the human as a kind. A person on such a path is self-protected from any artificial influences. There is a condition — a minimum of common sense. An example of such a minimum: one needs to cross the road on green and at the acceptable crossing place (as it is safer that way).
Ritual HORA — is not the awakening of the Kundalini with all the consequences (often most deplorable). It is evolutionary — directed action, its fetus (see above about the womb). Without my explanations and evidence, the HORA ritual could only rely on faith. It's like in a religion — a relationship with the Source did not have to be proven, it was obvious — it was manifested in the Teacher, i.e. was seen through the eyes and tangible.
Today, we live in such a time that common sense thinking, in any case, is not an obstacle, even for faith. The ritual of Practice HORA:
1) expressed through the Master and
2) repeatedly proven in its effectiveness on different people
And most importantly for this meditation (ritual HORA) the external factors are not important — do it when you want, whenever you want (about the effectiveness: see the beginning of the article).
The initial impulse of evolution continues its movement in every new species. Through division, the impulse remains WHOLE — there is one Tree with many fruit. This is the Tree of evolution, i.e. The Tree of Life, that is, Kundalini.
Ritual — it is the fruit from the tree of evolution (Tree of Life).
The Impulse, the Tree, the Fruit (species) and Immortality are inseparable.
Here is what is important to understand. The education in such methods — is the absolute unity of the religious, mystical, and scientific approaches. Thus, in answering your questions, I emphasize the multiple aspects of the human heritage; many factors must be taken into account. I bring this topic to you, anchoring on the minimal information we already have and simple common sense thinking. This approach makes this grand topic accessible to everyone. In this response, we have only touched the surface, since this topic is so extensive. But a connection to the SOURCE is even deeper.
Why is the opening of the centers (chakras) so important for yogis? Humans did not appear out of nowhere, just like that. Each center, chakra — sky, inhuman carries evolutionary memory elements that dominated during certain periods of the evolution of the Earth, when there were no humans yet on the Tree of Evolution. But the very Tree already existed on Earth. At the same time the Earth and, respectively, the Tree — were affected by the planets. Scientists came to the conclusion that first came the evolution of the cosmos, second the evolution of the Earth; thus, the Earth is not flat and rotates around the sun, not vice versa.