How to buy WIF crypto in USA?

Could you please explain the steps involved in purchasing WIF crypto in the United States? I'm interested in understanding the entire process, from choosing a reliable exchange platform to making the actual purchase. Additionally, I'd like to know if there are any specific regulations or considerations I should be aware of while making such a transaction. Could you also provide some insights on the security measures I should take to protect my investments? Thank you for your assistance in this matter.