The traditional OBE has us floating ghost-like out of our physical body, roaming around our house or local environs and this is often what seems to happen for early experiencers. At some point for this group, things change and the Non-Physical environment seems to develop or advance. The environment moves from a monochromatic picture to one of a more dynamic and technicolor environment. In one sense, this is moving from the Etheric to the Astral level...I'm not confirming this; I am just pointing out the context.
My next idea and from my own experience is, the traditional OBE is fine to start with (it is where I started) but we necessarily move into the Phasing model, which is a big rethink. The Phasing model does not answer all our questions but it moves us to the next level of experiential relation to what we are encountering.
So my point is this:
Do you remember daydreaming as a child?
That was Phasing, in its' simplest form.
You got bored with one Reality and chose to tune out to another, one of your own creation...that was arguably a Non-Physical or Astral Reality; maybe just a personal creation or maybe something greater...but who knows, and it was a credible Phasing experience that lasted up until the teacher called you back...
So you have actually been there and done it...remember how easy it was and try to recapture that simple process, methinks it had something to do with Intent.