I usually recommend the book:
«You Cannot Die: The Incredible Findings of a Century of Research on Death» -Ian Currie
https://www.amazon.com/You-Cannot-Die-Incredible-Findings/dp/0458937509/ref=tmm_hrd_swatch_0?_encoding=UTF8&sr=#

And, once more, when you are «dreaming» anything at night-time (or I guess it doesn't matter which «time» of day), you are not merely «generating hallucinations» but in reality... your «dreams» are actually «tokens» of a Greater-Reality; they are «hints» into the various «realms-of-existence» (universes) within which one may find themselves. Yes, reincarnation also exists, but, is not required.

Suppose you have a box of like 50 cue cards with targets written on them (fun fact you can cover the cue card with another one and staple or tape it so it has to be opened) and you keep 2 file folders, one says "RV" and the other says "LD" for lucid dreaming. Or don't abbreviate, whatever. Once in a while you put a new card in each folder. The RV folder we already know how that works, you just do a regular session. For lucid dreaming you try to get yourself to dream that you touch the folder somehow, and that's it. You document your dreams and wherever you dreampt of touching the folder you see if what you documented had anything to do with the target