How to use a credit card to buy crypto?

Hello, I'm interested in learning more about how to use a credit card to purchase cryptocurrency. Could you please explain the process in a step-by-step manner? Specifically, I'd like to know which credit card companies allow such transactions, how to find a reliable exchange platform, any potential fees or limitations I should be aware of, and finally, any safety measures I should take to ensure the security of my transaction. Your insight into this topic would be greatly appreciated. Thank you in advance for your assistance.