For me, I want an exchange that needs to be known and used by many people, which will make me trust it more, some of the requirements I always want in exchanges, like this:
- No KYC
- Low withdrawal fee
- Support multiple coins/token
- There is a large community
- 24/7 support
- Ensure asset safety for users
 ...

You can learn about Binance, MEXC or Kucoin, which seem to be good exchanges.