I am planning on reinstalling to new drive(s) the next time my distro releases a new version and i am interested in drive encryption, so i was wondering

if i have root and home on two separate SSDs and they are encrypted with the same password, would i have to enter the password twice to boot? and would there be any other downsides of an encrypted two drive setup?

is there anything i should take into account when using or setting up drive encryption? any best practices for drive encryption that i should know?

thanks in advance