I don't have the time and energy to tell you everything right now. But basically you need to be completely and utterly grounded, with the ability to keep absolutely everything from getting inside your head. You need to be able to painstakingly examine even your own thoughts and to have learned to recognize a thought running among your thoughts that is not genuine, not your own. When an idea gets injected into you, to know and understand the trajectory and source. The ability to discern good and evil energy, to perceive good and evil as energies of order and chaos. If you are not already keenly aware of what we call God, then you should likely adopt and follow a Christian outlook until you come to know about God. There are vast amounts of energy at play in the dimensions you are experimenting with and you must know how to handle yourself in these places. For example if you plan on intentional psychonautical activities it is best that you eat a vegan diet at least 48 hours in advance to achieve the strongest vibration. You must drink a lot of water. You need to have completed training in every level of consciousness up to Kundalini with a shaman(English: meditation, weed, research chemicals, mushrooms and acid, with at least a mild introduction with DMT). There are so many and varied ways to defend yourself.