Take some acid. That might help your imagination.
Maybe some sleep deprivation then. That might get you hallucinating.
I wouldn't meddle with the spirit world if I were you.
You are in more danger than you'll ever know...
astral projection should be done naturally, i did it a couple times without realizing it after high school. It leaves a vary distinct impression on your soul, a mark that never washes away.
If your karma is to allow you to do it no practice will be needed. If you are not meant to do it - as most people - no amount of trying will induce it. There are "tollkeepers & guards" at those gates too...for good reason.
Karma, by definition, is mysterious. I have great karma obtaining houses over many years but lousy karma getting anyone to fix them up.
Anyway exactly what would you do if you could project - how would you be helping me for instance? If your motives aren't pure that will stop you. :(
OK your motives are pure. My guru's guru had a book produced of his utterances called Chidakash Gita. I presume you refer to the Akashic Records. Read his book for some direct revelations and see this link for some others. (I don't purport to believe the others)
In any case the records, being experiences of humans who have lived will do little to influence those to come. :(
It takes practice...years of practice.