Ty for helping.
KYS no problem for me.
Coinbase doesnt have a service to send to another wallet.
Sell is same to send btc to my friend? (e.g.)
What do you mean?
Coinbase has a wallet you can send and receive from. As long as you're sending to a correct BTC address, the Bitcoin you send from Coinbase will arrive into the wallet whether it's an Electrum, Bread, Bitfinex or paper wallet.
Selling isn't the same as sending BTC to your friend. Selling is only exchanging funds - when you sell BTC, you receive another currency in exchange
in your own wallet.