How to buy from CoinGecko?

As a cryptocurrency enthusiast, I'm often on the lookout for reliable platforms to buy and trade digital assets. CoinGecko has been highly recommended to me for its comprehensive crypto data and analysis, but I'm a bit unclear on how to actually buy cryptocurrencies through the platform. Could you please guide me through the process of buying from CoinGecko? I'm particularly interested in understanding if I need to register or set up an account, which currencies are supported, and any steps I should take to ensure a secure and smooth transaction. Additionally, I'd like to know if there are any fees associated with buying through CoinGecko and if there are any tips or best practices I should follow to maximize my investment. Thank you for your assistance!