This method worked for me but I modified it a bit.
I’ll type out my experience with Seere.
So I found his enn on youtube and I listened to that for at least 3 days as often as I could. I listened to his enn while I was at work, I had it on loop when I slept, and I listened to it in the car instead of music.
Then on the night of the ritual, I waited until my entire family had gone to bed and I either played his enn out loud and chanted with it or just chanted it without the aid (can’t remember)
Then I meditated on his sigil/ stared at it until I felt his presence on my back and spoke my peace.
My offerings were some sweet smelling candles and I agreed to make a post about him on BALG then I dismissed him with thanks.
That’s really all you need to do if you want to make contact and have decided to ask for help.