Shamanistic trance is a good manner to try and learn to contact with other realities and entities.
I'm started to practice these shaministic methodes on a way influenced by technology. Using drumcomputers to create drumming paterns for the voyage, the use of brainmachines or other modern methodes like hemisync sounds who improve your state of mind and connect it with the heart. And recently I bought a didgeridoo who give a radiant glow in- and outside my body. Sometimes I'm wandering around somewhere in other dimensions. I feel not always to strong to make contact with entities, but the never are violent.