I second the above. Even though I had a bad experience the last time I used Kucoin, I would still suggest it to people however, I would highly recommend you to store your trading password somewhere safe. It doesn't matter if you have your email and 2FA, if you lose the trading password or forget it, you might get asked to submit your documents.
The trading password is just a set of 6 numbers and I don't see how it should be any problem for a trader not being able to memorize it easily. Except where a trader goes ahead to make it complex for himself by closing his eyes while keying the numbers 😏
I have this comparison that kucoin is like a baby Binance so just like everyone else telling that kucoin is better, I'll say the same suggestion about kucoin.
Kucoin is just a xerox of Binance during Binance's early stage of 2017/18 before CZ brought in so many innovations to his platform of recent which has now made Binance somehow complex. Kucoin is user friendly with easy navigation on the site.
But because I have no experience using coinex and not that much aware of their reputation, maybe they could also be another competitor in the near future with the top exchanges, who knows and it will depend on their updates and progress.
Coinexchange lived its prime in 2017/18 before it declared bankruptcy or so and then went under before coming up again. It was one of the first exchanges in addition to Poloniex that I opened an account with when I newly joined this industry (I don't even know what's up with Poloniex too now). Sadly, I won't encourage anyone to keep an account with them now. OP, go for Kucoin.