Thank you for your replies.

I think I didn't word my questions right. I struggle to see where my own imagination ends and this astral thing starts. What part do I have to imagine and what part comes from the astral?

 >>/4242/ Asking my tulpa, she doesn't really know what I don't, but it's true she has showed me things I didn't think were possible.

I will start with the catgirl sigil, as in, I will draw it on a paper and "open my mind" like I do to hear and see my tulpa. I will post results later.