Yes.
Absolutely, it is possible.
That’s completely up to you. One thing to keep in mind, when dealing with any sort of entity, but particularly demons, is that you, and only you, are in charge of your life. They do not get to dictate whether or not you work with them. It is always, and forever, your choice.
It can be, if you’re not properly prepared.
You could be, but the imagination is often the bridge to real spiritual experience.