Yes. Those are complex questions. I cannot answer them in even a couple of posts.
Such details can be found in the following sections:
“Mental Body – Gandhabba”
“Gandhabba (Manomaya Kaya)”
I recently started a new section to discuss this in a systematic way:
“Buddha Dhamma – A Scientific Approach”
You may want to scan through the above sections to see which section would best for you. Each person is different.