How do I purchase Shiba?

Excuse me, I'm interested in purchasing Shiba, but I'm not quite sure how to go about it. Could you please walk me through the process step-by-step? I'd like to know what platform or exchange I should use, what kind of account I need to set up, and what payment methods are typically accepted. Additionally, are there any security precautions I should be aware of when making such a purchase? I appreciate your help and guidance in navigating this process.