First of all, hello & welcome to the forums 
Most likely, the technique you are searching for is WILD. You do it after 4,5 - 6 hours of sleep or during daily naps. It will let you enter REM sleep, during which you will experience lucid dreams/OBE’s whatever…
Instructions on how to do this technique are explained in detail in this forum - [WILD - An user friendly tutorial)
WILD may be hard to do at first, so I would also recommend to try lucid dreaming inducing techniques like MILD, All day Awareness and DEILD (Chaining). You will find tutorials on these techniques in the guides section.
Good luck!