[spoiler?] what I'd answer to 1900
you are right: that endless world is scary, for everyone.
that's why, day by day, we build our own ship; an imaginary ship, made of the roads we know, caring friends and family, strangers we greet or simply ignore and a safe place where to live, and every single day we walk in this ship from bow to stern, only once in a while to stop and take a look outside, until we get shivers.
Nobody is asking you to play on God's keyboard, simply because you can't... no one can, and in the very moment you'd put that foot on the ground, you'd realize that it's possible to find the 88 keys you need.