There are many complex topic can be explained in POK but everyone who wants to walk of this path should know few basics things. So to understand how the pok actually works….
1) Learning through direct experiences.
2) Three levels or layers of knowledge
Self realisation
Essence of experiences
Oneness
3) Defination of truth and false. I.e. satya and maya.
4) Duality - i generally talks about non-dulaity that is why I could see many of people get so many times tangle in duality by asking questions like how presence and oneness could be same. They yet have to learn about how duality works.
5) Having a guidance - someone who have already advanced in this path. This is also very important so that beginner don't get lost in some kind of belief.
6) Patience with Pok. No monkey mind by jumping from path to other or from one guidance to other.
There are others too but as far I come to conclusion these are most important. Even the most important out of all these is to learn about three layers of knowledge through your own experience.
Now after that if you want to learn more you have to develop basic things of pok all 6 are important if to continue to know about spirituality through pok terms.