Crypto exchanges, both centralised and decentralised, are still relatively new (the first crypto exchange, Bitcoin Market, launched on March 17, 2010, was the first), so it's important to do your homework before deciding which one to use. Because cryptocurrencies are volatile, and some crypto exchanges have been hacked in the past, it's critical to consider a variety of factors when choosing an exchange, including but not limited to:
Deposit/withdrawal limits
Fees
Payment methods
Regional restrictions and regulations
Reputation
Verification requirements
It is up to you to find the crypto exchange and digital assets that best suit your needs, price range, risk tolerance, and security expectations. It's also important to understand that some crypto exchanges are only available on mobile devices, while others require powerful, specialized computers, and each has varying levels of security and associated fees.

There are a lot of different exchanges on the market, if you live in Europe then probably the best choice is to look for an exchange from your country or Europe.