I have noticed lately that what I believe are astral fauna have been following me around in the physical realm. They give me a companionable feeling and I'm not afraid of them. They manifest themselves in shadow-like forms, and most of the time they skittishly dart away before I can see what they are, but recently I was able to see a lion's head peering at me from the wall and a large inchworm in my sink. (A shadow inchworm, even though, yes, a real one would fit in my sink.) Also, I have never been in the astral realm knowingly, but I can see the barrier between it and the physical realm. How can I get through it?
Shadow-like entities are very common. A metaphor I used elsewhere is that this world is full of squirrels, pigeons, mice, insects, and similar "lesser" creatures that most of us just don't bother noticing most of the time. Many of the shadow-like entities are much the same. They don't always follow us, they're just numerous and curious. And when you pay attention to them, they pay a little more attention to you. It's like saying hi to somebody. They will notice you more because of it. Except in the astral, paying attention to something is quite similar to actually interacting with it.
Try first a oobe(out of body experience) imagine your astral body looking at your phisical body then,once out,try to find or create a rift,a hole on the dimension,then jump on It.you will fall on the astral realm.