Perplexed!
what im simply doing is to go with electrum only. I'm gonna create a wallet and keep the seed, private key offline or will note it down in my copy. I'm not gonna open a wallet but store a btc like few a month (part of my salary around something 20-80$) regularly. Will see the fruitful result after long years.
This is the best thing to do, as using any other tool will definitely be just too much, same as choosing your own seed phrase, electrum has been a very good wallet over the years but the safety depends on you.
First make sure you’re generating the seed phrase offline and not connected to the internet,
further more you don’t need to store the private key because the seed phrase is just enough although electrum seed phrase is custom and cannot be restored by wallets that are not compatible with it, but should even in future there is no electrum seed phrase compatible wallet you can still get the private keys from the seed phrase.
Further more you can also add passphrase to your wallet seed phrase and store them separately offline for more security