Can I buy and sell on CoinMarketCap?

Can you please clarify for me? I've been hearing a lot about CoinMarketCap and I'm interested in exploring the cryptocurrency market. So, I have a question that might sound basic, but I'm still a bit confused. Is it possible to buy and sell cryptocurrencies directly on CoinMarketCap? Or does it serve a different purpose? If not, could you recommend some platforms where I can safely buy and sell crypto assets? And are there any particular safety measures or things I should be aware of when dealing with cryptocurrencies? Thank you for your help in navigating this new territory for me!