How to buy on Avalanche Chain?

Could you please elaborate on the process of purchasing tokens on the Avalanche Chain? I'm interested in understanding the steps involved from setting up a wallet to actually making a purchase. What kind of exchanges or platforms should I be looking at? Are there any specific requirements or prerequisites I need to fulfill? Additionally, could you provide any insights on the safety measures I should take to ensure a secure transaction? It would be great if you could explain these aspects in detail. Thank you in advance for your assistance.