A good thing to have as an astral or spirit worker is an astral home, which can also be called an astral temple. It is a space on the astral plane that is completely yours, unless you invite anyone else in. You still need to protect it with wards, because unwanted spirits may still enter the space if you don't.
It is a good place to get used to the astral, practice basic skills, and also to do magic. You can also invite deities or other spirits to talk.
They are created through meditation. I'd reccomend reading other sources on this before attempting it. This won't be in depth.
It may be good to brainstorm beforehand. You can be as descriptive or as vauge as you want. You can let the details fill themselves in if you want to have things to explore.
You may find that there is already something waiting for you. It should make you feel safe.
I let the details fill themselves out for mine. I wanted a house, but I didn't have to imagine it throughly for it to appear. It looks just how I want it to, though. I realized later when looking at pictures that it looks like an English cottage in the countryside. There's even a garden with a little white fence.
I plan on adding a lot more. It's a good place to explore my abilities in the astral, and also to hang out to relieve stress.
When its daytime in the physical world, its daytime in this astral world. Same with night. I can change the time of day if I want, but it will reset when I leave. I wanted a day/night cycle in mine, but yours can be set at any time permanently if that's your preference.
I don't know if other system members can access it... Since it is mine, they probably could if I was around, but not by themselves. I believe this is different from an inner world, which we don't have. If you don't have an inner world, you can also create one through meditation. I don't plan on doing this without talking to others first.
It would be cool to have a space where we can interact in our own bodies, in a way.
I intended for this place to have a lot for me to explore. Everything is there for a reason. I found a table upstairs with two chairs. One looked like it could accommodate my astral wings. The other was darker, and not suited for me. So it isn't my chair, it's for someone else.
There is a long mirror across from the table. I do not know why. It isn't a portal.
I haven't found personal rooms other than my own, but I also haven't explored every room. I could look around more. I spend most of my time in the house in my room.
I have a cave system, too. One of the caves can only be entered through a boat or by swimming. At the end of it is a chamber with a pool. This is where I can reflect- Wait, I just got that. There's a pool for me to see my reflection, lol... I could do some meditation with that.
I want to add a place up high that I can fly to. Maybe I just haven't discovered it. There are some mountains that I haven't explored much of.