What I consider a MUST HAVE?
Ethereal Crystal initiation, free to be found online… No prerequisite initiations needed either.
A gem really! 
https://gnosiscorner.jimdofree.com/2019/03/11/free-ethereal-crystals-attunements-1-12-manual-pdf/
Use wisely…
Remember we are 99,9% empty space. I usually ask for 1% to be filled with a certain crystals energy. Or I wrap myself in a giant geode for the night, Amethyst is great then.
Just experiment & let me know what works for you! 