How do I buy radix XRD?

I'm considering investing in radix (XRD) but I'm not entirely sure how to proceed. Could you guide me through the process of purchasing radix? I've heard about cryptocurrency exchanges but I'm not familiar with how to use them. What are the steps I need to take to create an account, fund it, and ultimately buy radix tokens? Additionally, are there any specific considerations I should make before making the purchase, such as fees, security measures, or the volatility of the market? Your advice would be greatly appreciated as I navigate this new investment opportunity.