For beginners, the safest choice is usually a well-known exchange that has strong security and is easy to use rather than one that just offers lots of features. In my opinion, platforms like Coinbase, Kraken, or Binance are commonly used because they have solid reputations and beginner-friendly interfaces. But even with a “safe” exchange, the real safety comes from how you use it like enabling two-factor authentication, not keeping large amounts on the exchange, and starting with small investments while you learn.