A sigil would be enough. Meditate. Take deep breaths (4 till 6 seconds). Gaze.
Do that for 15 min. or more and you will get into a trans state. Than just invite her and ask your question!
Test it. With the ear phones and without. With closed eyes, without ear phones, will help you with clairaudience. Because you learn to distinguish sounds
Yes no problem. I work with Lucifers open sigil. Or Nikita the Genie/Angel. When you stay and work with them they are with you. The only time to close a sigil is when you got no use for it. You declare your sigil void, in your head or saying it loud. And then flow with the elements, burn, nature or water.
Let’s say you do Sigil Magick and you don’t need the Sigil anymore. Then you can close a Sigil too. Just by saying the Sigil has done it’s task I close it hereby or declare it void.
It could be insulting to throw away a sigil without closing it.