How to buy Sia?

Could you please elaborate on the process of purchasing Sia coins? I'm a newcomer to the cryptocurrency world and am interested in investing in Sia due to its decentralized storage capabilities. What would be the first step in acquiring Sia? Should I set up a cryptocurrency wallet first? If so, which one would you recommend? Also, where can I find a reliable exchange or platform to buy Sia from? Are there any specific fees or taxes I should be aware of? Additionally, are there any security measures I should take to ensure the safety of my investment? Your insights would be greatly appreciated.