I would like to know how others keep these secret phrases if the people in your house are not really knowledgeable in crypto. Would it be safe if I store it online but the file is encrypted and password protected?
You're already on the right path to storing your seed phrase, you did it right to have an extra copy so what are you afraid for.
I'd rather store in on a piece of paper than keep them online, that isn't advisable because anytime, it could be hackable since you're connected to the internet (
unless you've air-gapped device that didn't connected to the internet) anytime.
I think it's on us who are responsible to keep our seed phrase safe in the first place, as you've said you put it into your computer table that shouldn't the right place to keep a valuable stuff.