I, too, am an introvert. Physically, I couldn’t do many things I wanted to do, so I spent a lot of time on my own, thinking, overthinking, speculating, dreaming and meditating.
I tried a few things – hypnosis, to help me control my breathing and to investigate whether my problems were aggravated by psychosomatic causes – ‘it’s all in the mind’ the doctors used to say. – The hypnosis sessions lead, accidently, to Past Life Regression. – One day, I may publish some of the 30+ sessions.

I have personally experienced 2 Past Lives. There I was in deep hypnosis – the therapist instructed me to go back to where I felt “it” all began. – Back, back, back.– No further prompting was given.
The memories that flooded my mind were real in every sense – sounds, smell, taste, feelings, temperature, emotions, perception, depth, history, physical contact and awe. – And the memories were not from my current life. How could they be? My previous life was a young boy killed in the last world war. The previous life before that, I was a woman. – I was completely spooked. – And nearly broke the regression session. - So the first conclusion was inescapable – reincarnation must be true. – Much research followed.

So I began to speculate on what it must be – life, death (not so much – purgatory or some form of inter-life) and then a new life.
So what else could I conclude – Probably Heaven and Hell are not eternal and both are here on Earth.
So, how can I expand this philosophy? - The Scala Naturae conceived by Plato, Aristotle, et al – see Wikipedia. – I am not a student of classics, so no BS here.
I hypothesised that we must earn the right to move up this concept of ladder of life. – So each of us must have a ‘Day of Reckoning’ where we are on trial for our current life.
If we earned the right? – Could we influence the decisions on who we would be in our next life?

Somewhere in all that speculation was the foundations for my first book. - It is the essential theme of ‘Samantha’s Journey into Real Magic”. It isn’t really a series. The story will be at least 3 parts; it is 4 at the moment. Part 1 is just the ‘set up’. The essence of life is defined in Samantha’s Little Black Book (Grimoire if you insist, but Samantha claims to be a healer, not a witch).
My original villain was Cancer. – But this was not the tangible person that the public expects.
My first attempt at the story was written in ‘first person’ point of view. – Imagine the power and feeling… I am Samantha!!! – BUT, first person POV is very restricting. – You cannot write about what other characters are thinking. – Five years later, I decided on a rewrite – new villain (a person) and sadly for me personally, third person POV.