I would like to encrypt this dedicated server (the fixed, against malicious code ejection) install all config

1/I would like to encrypt this dedicated server (the fixed, against malicious code ejection)
2/I would like to be able to use it for a storage part and creation of an email box (example similar to gmail)
it's up to you to see what software and compatible application you need (all os, and android and windows
installation for photo video storage
config and install