That's actually a good idea, would you recommend coinbase or anything else. It seems there are so many.
Coinbase is the most recommended one, it's already suitable for you... but you can also trade on binance.
I've read that Binance stopped their service on US, but you can still use VPN if you want to trade on binance.
Do you want exchanges that requires KYCs? If not, you can choose exchanges that doesn't requires it.
Here's the top 5 decentralized exchange platforms based from trading volume.