Where can I find the available for purchase cryptocurrencies?

Excuse me, I'm interested in exploring the world of cryptocurrency investments, but I'm a bit overwhelmed with the vast array of options. Could you perhaps assist me in navigating this? Specifically, I'm wondering where I can find a comprehensive list of cryptocurrencies that are currently available for purchase. I'd like to ensure I'm looking in the right places to make informed decisions about my investments. Any suggestions or platforms you could recommend would be greatly appreciated. Thank you for your assistance.