Hi there, I don't use oil pastel but I do have a full tutorial on a cat in soft pastel at ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-GguH3aO2RfM.html. Might help you with fur :-)
Timelapse at ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Vk-8SDmWCS4.html Full tutorial series at www.emmacolbertart.com/2022/01/15/cat-and-kitten-paint-along/
The type of pastel papers I used hold the marks really well and light goes on top of dark without smudging out of control. No fixative required. I used Velour for this one, but also Pastelmat paper is good!
