Sybe,
If you would allow a word of advice from one participant to another,
Getting to understand all about vinnana dhatu, even getting to experience it, would not help in the least in tackling, let alone eliminating, your,on your own admission, ‘many problems, kilesa’s, greed, hate, delusion, fear. Nothing i do not have.’
I share your eagerness to know about these things. Before coming across Buddhadhamma, this delving into concepts like Infinity and Eternity was for decades my ‘favourite private domain’ so to speak. Up to about a year ago I had to pull myself forcibly away from this almost natural tendency of mine. Now it is much easier to do so. Why? Getting into that jhana, even being reborn in a corresponding arupavacara realm, would do nothing in the way of attaining or progressing in magga phala (you may still end up in an apaya)- what to say of merely philosophizing about it and trying to figure out the experience of it?
Your priority is to deal with the many problems you mention. Concentrate on that. Time is ticking. “– What is critical is to avoid dasa akusala or immoral deeds (miccha ditthi being the most important), and to cultivate kusala (moral deeds).” There, Sybe, simply stated, the way to deal with your problems. Getting around it will not be that easy though.
Metta