When looking for a good exchange, the first thing to consider is security. The security should be impenetrable, and exchange should respond fast, in case of any attacks.

Find out, if the broker is compliant with the local laws or not. For instance, when I first traded through BeaXchange, I was relieved to know that they have registered with the European Union.

Check if the exchange is cross-platform.

At last, consider reviewing the transparency and trading fee of the exchange.

In case, if you are stuck somewhere, you can join this group, https://t.me/beaxchange for more information. Hope it helps!