It seems that at some point there will be an adequate phone wallet with both advanced (to get your private keys) and basic functionality (for noobs).
I looked into wallets and some are gaining more and more functions lately and seem on the way to a more polished product.
Maybe a good phone wallet is going to be a solution.
I like how Muun does it.
https://blog.muun.com/why-not-just-a-mnemonic/