How do I buy encrypted currency?

Hello there, I'm curious about purchasing encrypted currency. Could you please walk me through the process step by step? I'm particularly interested in knowing what platforms are reliable and secure to use, what factors I should consider before making a purchase, and if there are any fees or taxes associated with the transaction. Additionally, I'd like to know if there are any safety precautions I should take to protect my investment. Thank you in advance for your guidance.