Reach out to Gift of Life for a detailed overview.
Someone I am associated with will be donating in the very near future. They have provided the donor with a detailed overview and I was privy to the information.
Never do any procedure without consulting those that you trust, such as your physician and others that you would normally consult with.
Everything in life has risks, including a short car drive. But in the scheme of things this is considered a very low-risk procedure.