Where can I find Cryptos?

Hello there, I'm new to the world of cryptocurrencies and I'm curious to know where I can find and purchase them. Are there specific platforms or exchanges that you would recommend for beginners like me? I've heard about Bitcoin and Ethereum, but I'm not sure where to start. Can you guide me through the process of finding and acquiring these digital assets? Additionally, are there any safety precautions I should be aware of when navigating the cryptocurrency market?