Which crypto to buy first?

I'm curious, when it comes to investing in cryptocurrencies, which one should I consider buying first? I've heard about Bitcoin, Ethereum, and a few others, but I'm not sure which one is the best starting point for a beginner like me. What factors should I consider when making this decision? Is there a specific cryptocurrency that's more suitable for long-term investments or is it better to diversify my portfolio from the start? I'd appreciate your insights and guidance on this matter.