Write things down

You will break something - and that’s good, it’s the best way to learn - but you’ll want to make a note of what you did / went wrong / how you fixed it.

Future you will still break things and be grateful that you wrote that thing down

You’ll buy something and find next year it was the wrong thing (too small, too large, too old, too new), so just get second hand stuff until you know what you need.

Cabled networks are so much better than wireless, but then you’ll need switches and cables and shelves and stuff… so using today’s wifi is fine, but know where you’re heading.

You need to store you stuff - that’ll be in a NAS

You need something to run services on - that’ll be your server

These might be the same physical metal lump (your 2nd laptop?), they might be separate… play around, break something and work out what feels right for you… and then put your data on there

… and that’ll break too.

Just be aware… if sync files between devices. That’s not a backup. (Consider you’ve deleted / corrupted something - it’s now replicated everywhere)

Having a NAS with 10 drives in a RAID6 array, is not a backup. It’s just really robust against a drive failure, but a deleted file is still a deleted file.

Take a full copy of your data off your system - then restore it somewhere else.

Did it work? If so, that’s a backup.