You can start with writing them down on paper first and the upgrade your "storage" after you get the hang of it.

From what I know a device like SeedSigner should be easier to handle even for a newbie, you can built it yourself and it's stateless, so all data will be forgotten once powered off.

@DarthCoin has wrote many guides but the one that fits here should be this one, at the section of HODL wallets (I linked to that section directly).

I'm also a newbie, surely other will be able to give you other ideas.