How do I buy BNB on Binance?

Could you please explain to me, in a step-by-step manner, how I can purchase BNB tokens on the Binance platform? I'm interested in adding it to my cryptocurrency portfolio, but I'm still unfamiliar with the process. Would it require setting up an account first? What kind of payment methods are accepted? Also, is there a minimum purchase amount or any fees associated with the transaction? Additionally, I'm concerned about security. Could you highlight the security measures Binance takes to safeguard user funds? It would be great if you could provide a detailed yet concise answer to these questions. Thank you in advance for your assistance.