you two will find a lot of common language. i remember she also started with at least 3 months Yoga learning in India , probably several times. probably she posted in this forum before on her learning.
https://omnec-onec.com/ explains the astral world. I am following her teaching to meditate, most of the time using mantra HU.
but i know it also has limitation, and i was controlled in someway. so on one hand, it still fits my current consciousness level. on the other hand, it's just a matter of time i have to move on.
I also practice meditation based on Marina jacobi's teaching, but it requires much higher level of consciousness and diet. so far it is only working when practicing with her and other people together. but it's amazing...
i think what I practiced most these days is a simple thing: maintain peace and joy state 24 hrs a day. no matter what happened. this is easy to say , but very hard to do :-)