Hi and welcome to the Chiari forum.
We do have a prayer thread ...post your surgical date there to have a prayer thread posted for you.
It is very scary, and it would not be normal to not be scared......
There is a thread with tips for the hospital stay....
http://www.medhelp.org/health_pages/Neurological%20Disorders/Tips-for-the-Hospital-Stay/show/1136?cid=186
The members here have added to this list after they had surgery with tips to help others....
Once home it is important that you rest and not try to do daily activities too soon...walking and neck exercises they give you while in the hospital are the 2 important things to do as well as take meds on schedule and not wait till pain starts or the meds will not help...keep ahead of the pain.....make sure you have a stool softener.....have patience and rest , rest and then rest some more.