Full disk encryption

Hello all! It's my first message; I'm linux entusiast, not expert. I would love to install CRUX at mine unbricked chromebook. I know it's not deamon :) Is there any, good, guide how to encrypt full disk at installation? Any protips what should I read before? I seen guide at crux.nu wiki but it seems uncomplished howto, and a little bit out-to-date. Best regards, Mat