There are many crypto exchanges that are really good and can be well recommended for beginners in order to give them proper guidance and adequate service delivery in terms of cryptocurrency training transactions. I normally use Binance exchange, KuCoin exchange and sometimes I use Hotbit exchange too also I do use pancake swap incase I have some tokens I will swap probably if the token is not listed on Binance, KuCoin or Hotbit. Those are the cryptocurrency exchanges I used, and I fully trust them and I believe they are recognized worldwide.