Wow, you really care about your security.

I'm not sure if there are any decent hardware wallets for Litecoin.  I think Ledger devices might offer compatibility but I can't remember so do check.

If you hold it on your laptop it should be fine as long as you back up your storage regularly and don't go on any dodgy sites.  If you're holding a really large amount of Litecoin it might be practical to buy an old computer to only use for that purpose and keep it somewhere safe, as it wouldn't be too large an amount of your money.