How to buy dox?

So, I'm interested in purchasing Dox, but I'm not entirely sure how to go about it. Could you walk me through the process? What exchanges can I use to buy Dox? Are there any specific steps I need to follow? Is there a minimum purchase amount? Are there any fees associated with buying Dox? How do I store it securely once I've made my purchase? Any advice or tips you can offer would be greatly appreciated. Thanks in advance!