Make sure before you shave that your skin is well moisturized. Chamomile tea bags calm your skin and have azulene, which is soothing to your skin. You could use a hair conditioner instead of soap. Maybe use a light oil in the shower, but just be careful not to slip. You could also use an oil-based soap as your shaving gel.
Vitamin E is pretty good.
Over time that will definitely help. Cocoa butter is also helpful. It depends on how bad the scars are though. My book is for all ages. I have recipes for children, recipes for mothers and daughters, teenage girls and senior citizens.