Which exchange has the lowest purchasing fees, along with quick ability to withdrawal?

I’m currently using CashApp for my purchases, which has around a 3% fee for purchasing and immediate ability to withdrawal. However, it only lets me buy BTC, so I have to take the fees/time to convert that to another currency.Are there any exchanges that have similar/lower fees as CashApp, and also allow for immediate withdrawals of funds? The ability to buy other currencies (ideally USDC/USDT) would be nice as well.

Submitted July 22, 2020 at 10:42PM