How to buy WorldCoin online?

Could you please explain in detail how one can purchase WorldCoin online? I'm a beginner in the cryptocurrency space and am interested in adding this particular coin to my portfolio. What platforms or exchanges support the trading of WorldCoin? Do I need to create a separate wallet for storing it? Are there any security measures I should be aware of when making the purchase? Additionally, what are the transaction fees associated with buying and selling WorldCoin, and how long does it typically take for the transaction to be confirmed? Lastly, what are some tips or best practices you would recommend for first-time buyers of WorldCoin?