How do I buy Crypto on Luno?

Could you please provide a step-by-step guide on how to purchase cryptocurrency on the Luno platform? I'm new to this and would appreciate detailed instructions. First, how do I set up an account on Luno? After that, what payment methods are available for depositing funds? Once I have my funds deposited, how do I select which cryptocurrency I want to purchase? Is there a minimum amount required for each transaction? Also, how secure is the platform, and what measures should I take to protect my investments? Finally, are there any fees associated with buying and selling crypto on Luno? Thank you for your assistance.