If you would rather make oat milk or cream yourself, it only requires soaking oats in water and blending them.
For creamier consistencies add less water. Be sure to soak the oats and drain them first!
For oat milk: 1:3
use a 1 cup of oats and 3 cups of water. Blend in a blender or use a hand blender.
For oat cream: 1:2
use 1 cup of oats and 2 cups of water. You can soak the oats as long as you would like, or if you are short for time, you can blend the oats and water right away.