Get a vibe and follow the instructions for Betty's Rock 'n Roll orgasm technique.
Try not to label your orgasms. Stay in your body and keep going.
I see no conflict in using your oil.
You can upgrade your masturbation technique and stop humping blankets.
I always do a vulva massage with oil before I use the vibe on or near my clitoris.
You can upgrade your masturbation routine and increase the intensity of your orgasms.
You have an unusual masturbation technique that may or may not translate into penis/vagina sex.
You can upgrade your masturbation technique to orgasm from a lighter touch/stimulation.
It will take time but you will can move forward past your childhood masturbation technique.
It will take time and practice to learn another masturbation technique.