Mount and ask to decrypt home on login, startx from the user persective after.

.bashrc

# Startx only if logged in on the first tty (leave other TTYs open for TTY use.)
# includes custom keymaps and startx
if [[ -z $DISPLAY ]] && [[ $(tty) = /dev/tty1 ]]; then
    human-interface
fi

config.fish

# If you want fish instead of bash.
if isatty stdin
  if test  "/dev/tty1" = (tty)
    cd ~
    human-interface
   end
end

go

#!/bin/sh
cryptsetup luksOpen /dev/sda4 home
mount /dev/mapper/home /home
swapon /home/swapfile
# The following is just in case I logged in as root.
su jose # my username (picked because it is short)

human-interface

#!/usr/bin/perl
use warnings;
use strict;
`~/bin/keymaps/desired-map`;
my $pid = fork();
if ($pid == 0) {`startx`}
else{`/usr/bin/monitor`}

profile

# Goes at the bottom of your bash's /etc/profile or equivalent
if [[ -z $DISPLAY ]] && [[ $(tty) = /dev/tty1 ]]; then
  /go #Custom script which calls cryptsetup. Change it if you want to
  #have a passcode flash drive, etc.
fi