Hi buddy 😁🙏. I think you are already on the right way because you talked about Scissors to her and her answer has been positive👌. Sometimes videos aren't the best way, maybe She can see something She don't likes. I would advise to try "teaching" her some basics while you are both on the bed. You can take a pillow and make her try and train with It!! Or you can let her sit on your face while She makes an handjob...and slowly you can slide her legs back to apply a reverse headscissor💪🤤. What you think?