I think you should consider Ledger Live or Electrum wallets for Linux OS. Ledger Live will require a Ledger hardware wallet to work, I think it's most secure if you care about security. It's easy to use and has a great user interface too, in addition to compatibility with Ledger hardware wallets. Electrum too is cool since it's among oldest wallets, open source and compatible with most hardware wallets. Be sure not to install fake wallets.