How do I purchase ChatGPT Plus?

Excuse me, I'm a bit confused about the process of acquiring ChatGPT Plus. Could you please guide me through the steps? I've heard it offers some advanced features and I'm quite interested in upgrading my current subscription. Is there a specific platform or website where I can make the purchase? Do I need to have a certain amount of cryptocurrency in my wallet beforehand? Additionally, are there any discounts or promotions currently available for new users? I'd appreciate any information you can provide to help me make this transaction smoothly.