How can I buy BTG?

Could you please elaborate on the process of purchasing Bitcoin Gold (BTG)? I'm interested in investing in this cryptocurrency but I'm not entirely sure how to proceed. Could you provide a step-by-step guide on how to acquire BTG? I'd appreciate any information on which exchanges support the trading of BTG, as well as any tips on how to ensure a secure and smooth transaction. Additionally, I'd like to know if there are any potential risks or considerations I should be aware of before making my purchase. Thank you for your assistance.