Step 1: Get a NAS or whatever, and copy over things manually when you know you care about them.

That's pretty much it for at least some basic protections, and not starting a whole project. Just made checksums before you send it, and verify the checksums after you send it, and that's pretty much it.

Then step 2-6 can involve doing encrypted off-site (cloud) syncing of your backups, automatic backuping and so on, but as a first step, just do something small and easy, so it won't feel like a hassle in the future.