How do I buy new Cryptos?

Hello there, I'm interested in exploring the world of cryptocurrencies and I'm wondering how exactly do I go about buying new cryptos? I've heard about various exchanges but I'm not sure which one is the best for a beginner like me. Can you guide me through the process of selecting a reliable exchange, setting up an account, funding it, and finally buying my first crypto? Also, what are some important factors I should consider before investing in any new cryptocurrency? Thanks in advance for your help!