Hardware wallet is the best, but if you can't afford it, you can use Electrum Wallet. Electrum is an open source wallet and it's completely free, like your own bank. Never hold on to Coinbase or any other exchange. This is very risky. Electrum wallet is best after hardware wallet.
Hardware wallet is recommended if you have large amount of cryptocurrency but it's okay too to use mobile wallet if your crypto is not that much but be sure to use and download mobile wallet which are non-custodial, there are many of them in the playstore.