There are plenty of spirits in the astral, and it's very common to run into them. Spirits have all kinds of personalities, just as humans do, so it really depends on who or what you run into. Some may be introverted and completely leave you alone, while others may follow you everywhere you go and try to be friendly. There are also malicious spirits of course, which is why it's best to have wards and other forms of protection around your room or house.
No matter what you may encounter, it's best to simply be respectful and leave them be. If you're looking for someone specific, such as some kind of guide, then of course communication is very important. I just recommend going into the astral for specific reasons to help avoid running into anything malicious. The astral isn't all bad of course, but I'm not going to sit here and lie saying that the astral is all love and light.
Overall message: Be polite to everything you may encounter, and know how to protect and defend yourself just in case.