How do I buy on dYdX?

Could you please elaborate on the process of purchasing on dYdX? As a beginner in the crypto space, I'm interested in understanding the steps involved. Do I need to set up a wallet first? Are there any specific requirements or qualifications I need to meet? Additionally, how do I ensure the safety of my transactions and funds on dYdX? I'd appreciate a step-by-step guide that covers the entire process from start to finish, including any potential risks or considerations I should be aware of. Thank you for your assistance in this matter.