How do I buy on SOL?

Could you please explain to me the step-by-step process of purchasing cryptocurrencies on the SOL platform? I'm a bit new to this and would appreciate a detailed guide on how to navigate through the platform, set up an account, deposit funds, and finally make a purchase. Are there any specific requirements or prerequisites I need to fulfill before getting started? Also, could you tell me about any fees or commissions associated with buying on SOL? It would be great if you could provide some insights into the safety and security measures SOL takes to protect user funds and transactions. Thank you for your assistance!