Yes, there's lots of astral entities out there.
I've met some, mostly enemy entities that are Extra-Terrestrials that are hostile to humanity and Satanists. Haha, don't worry, as you advance in power and knowledge they will come to you and harass you, lots of interaction there. Hopefully one-sided, as they thrive on your attention and won't leave or leave you alone if you give them your energy and attention. Not joking about that one, either.
It's great that you're curious and wanting to learn and know more, but most sentient Beings, even if they are living in Nature (like plants, flowers, trees, shrubs etc.), Spirits of different places or households, want to be left alone and just go about their business. Not everyone wants to talk to you. It's nothing personal. It's like strangers (humans) just wanting to go about their day and business and not talk to curious persons that want to ask about you, what you are, what you eat, what you like, etc.
There are some that are friendly towards humans, and they are of Satan, and they may approach you to offer help and advice, which is legitimate, not illegal and non-harmful to you and other humans. But they will make themselves known to you, at a time and place of their choosing. They are probably around, and just observing you to know what kind of person you are.
I am speaking from personal experience with interacting with sentient Beings (outside of the Demons on the Demons list on Joy of Satan website) on the astral since I was 8, and most of it in my teens, 20s and 30s (I'm in my late 30s now.)
I hope this helped a bit.
Hail Satan!