OBE's are on low vibration realms and can't lead to enlightenment imho.
"Consciousness expansion" is the way to go, where one can be here and somewhere else as well. When dasam duar opens, it is not an OBE.
My understanding is that It's your 'consciousness', not the soul that leaves when sleeping. This consciousness is enveloped in the body of mind which itself is in the play of maya.. Bani says "mann tu jyot saroop hai, apna mool pachaan" Once you can still your mind so that it sees your own jyot(Prakash), then you are in touch with your soul/atma. This is your mool that comes from Paramatma (atma)
I know it's confusing, but I did do a detailed post somewhere with many references to gurbani so that it was a little clear to differentiate.
Look dude I know how you feel. I used to constantly lock horns with my bibi but now she isn't around, I regret all that so much. You may hate her now but trust me, when she's gone, she'll leave a massive void. Make the most of the time you have with her. She's probably 70odd? Probably set in her ways. She won't be around forever. You'd rather have sweet happy memories right? She loves you whether she shows it or not. I'd do anything to spend a moment with either of my grandmother's. Do what she says, keep her happy. Talk to her about her childhood and stuff. How the good old days were. They're like cute little wrinkly history troves. Urgh <3 I want one.
The soul leaves the body everytime you go to sleep. It is just that you are not aware of it. SO the quesstion should be ... how do you become aware when the soul leaves the body?
The answer is with simran... you will become aware of your soul.... this is what Guru Ji has been trying to tell you all the time. Save your soul.