So I got a house, small farm patch, livestock pen, super awesome fishing rod with mend and unbreakable, everything iron....

Now what?

I’m working survival mode... I’m pretty sure I can survive at my base and surrounding area for weeks n weeks....

What do I do now? Is it all about making my house look nice? Are there quests? NPCs? Bosses?

Make a nether portal, make auto farms, then you go to the end for the ender dragon

Sounds like your playing Normal Minecraft 4 kids edition.

Probably, is the normal Minecraft for ps4 the kids mode? I have it set on normal survival, my kid has one set on creative mode where he just has everything and can fly, I thought I was playing the game as a normal person would.

I looked up a few what to do videos, learned you can enchant stuff, so that’s what I’m working towards the best gear in game. Then also saw nether world, looks like that is where ‘bosses’ are, or creatures that have good drops and hard to kill

Yes it is.

So that was a super easy game to beat using YouTube vids

Then I got tweaked one night and built some auto animal killing machines... they call them farms on YouTube, but they are just automated slaughter factories.... my kid really likes them, is there a way to like copy x-y-z cube from one game file and Paste it into another one?

yes its possible but youre getting into the territory of third party applications. your best bet would be to google how to copy builds from one world to another