If you are okay with KYC then go with a solid broker such as coinbase or blockchain.com
But I would advise you to get into the habit of using your own software wallet or even a hardware wallet and only use the brokers to cash out as you deposit, especially when dealing with large sums you run the possibility of your account getting locked for whatever reason. It has happened before.
If you are just doing small transactions here and there then you are ok.
Coinbase is generally good, but look closely at fees. Some charge really high fees!