One thing you can do, regardless of your advancement, is to do a ritual right after the death of the person to call upon their soul and also call upon the Gods to safely escort her to Duat, or a safe place for her to stay.
Then you can tell your goodbyes and anything else you wish to tell her in the ritual you make to honor her.
Even if you aren't able to communicate psychically yet, you can still do this and relay your feelings, your love and your care for them in the strongest way possible that no other person who is not an SS can ever do.
In my case, I set up an altar with candles in the shape of my Guardian Demons Sigil.
You can also do with Satan's sigil, or in the shape of runes, or both. I used small tealight candles for this, about 80 of them.
I cleaned my aura thoroughly. Raised my energies high.
Then I summoned my GD and asked her to watch over the ritual I am doing, to help me prevent any interference and protect the soul of the deceased.
Then I summoned the soul of the person to me.
Affirm:
I call the soul of "name of person" to me, hear my voice and appear before me. Take my blessings and feel my love and care for you, hear my goodbyes and heed my feelings, please accept my summon and join me here tonight."
I prepared the ritual in my living room, used a table to set up the altar. I had some chairs around the table, one for me, one for my GD and one for my loved one.
Of course, they do not require a chair, as they are only here in spirit, however it is more inviting to them to have a recognizable and pleasant setting to invite them to.
Call the affirmation as many times as you need to feel the presence of the person.
If you can't yet feel the presence of the persons spirit, you should pay attention to your emotions. When you feel a strong spike in them, usually it means they are there now.
After calling upon them, just talk to them, talk to them as if they are there with you, alive and well. Don't treat them any differently.
Invite them to sit down with you and listen to what you wish to tell them.
Then, let them know they have passed away, and that you called upon them to give your final words of goodbye, but that you love them and wish to send them to the afterlife safely.
Then, tell them your final words. Let your emotions flow freely. Tell them things you didn't have the time to say before the end.
Tell them your woes and your pain in missing them, reminisce over the past and go through your memories of the person out loud.
Don't explain on your beliefs or anything, you just do what you need to do to protect them and give them the greatest gift they could receive.
Let the person know to tell you anything they want to say, anything they wish to tell you, and so your best to listen.
If you cannot hear them, tell them this honestly
"I apologize, but I cannot know what exactly you are telling me due to the current circumstances and the distance between the afterlife and the living world, but please tell me everything you wish me to hear, even if I cannot hear you, I receive your feelings and emotions, and I receive your words."
Close your eyes and listen. Feel them, and ask your GD to help you receive the words and feelings of your loved one to the best of your ability.
After a while let them know you are giving them a gift to take with them to the afterlife and their next life.
Tell them to receive it as it will help them and protect them.
Then do a runic working.
Vibrate and strongly visualize the runes.
I chose to do a working for protection. I did Kenaz, Algiz and Sowilo.
Vibrate the runes, at least 50 times each, though no more than 111 times (too much is far too overwhelming for the person).
Create a ball of light of the energy of the runes and let the energy surround the soul of the deceased.
Don't force it upon them, but let it gently lay over them, like placing a blanket on the person with love and care.
Affirm out loud 10 times:
The energy of the runes creates a strong aura of protection around "name of person".
This aura of protection keeps "name of person" safe and protected at all times in the afterlife. This aura of protection grants them safe passage to Duat and through the astral, and protects "name of person" until they safely reincarnate to their next life.
Pour all your blessings and intention into this. Ask your GD to help you direct the energy and help make sure none of it is wasted.
Then, tell them your goodbyes, and say out loud:
I ask Satan to escort "name of person" safely to Duat, please protect "name of person" until they can safely reincarnate, please take care of them for me if it is not too much to ask of You.
Then tell the person it is okay now, they are safe now and can take their time to adjust to the present situation.
Tell them they are welcome to visit you any time as death is not the end, and is also a part of life, that even if no other person can see them or hear them, you are here for them and are open to listen to them and care for them.
Then send them off and thank Satan and your GD for helping you, thank them for their presence and their care before saying good bye.
After that, just linger in the energy. Let your emotions go and express whatever you need.
Process the loss best you can, knowing you have done the best you can for them and given them the most precious gift.
They may be confused, or may not understand what is happening, or may even be fearful, but that is okay. They will thank you deeply for it after they have stayed in Duat for a time, and have come to understand their situation a little.
Hail Satan!