CoinBase was good enough even then if you want to shift I think you can explore Binance and also the kucoin these two cex are going good now. I already used to with Binance for my trading and have know issues. Even then I want to say that always be careful and updated when you used a cex.
Most people have an account on Binance because this is one of the exchanges that many users including me often trade by finding good prices on this exchange, so indeed for trading then choose Binance but never store for long.
But I now prefer to use local exchanges this makes it easier for us to find crypto to fiat, but to find trading then look for global exchanges like Binance.
not sure if OP has replied in the thread since the last time he logged in mid-May. but if he just search i think he can find his way to Binance. he sounds very old Bitcoin user since he mentioned the old exchanges that were also shut down for years.
he does have coinbase though, he must be a US citizen which means he already has an account with the biggest exchange there. old user from old exchanges, he probably hasn't submitted KYC to any of the exchanges which he should be choosing wisely like DEX.