How to buy HBAR in the USA?

Could you elaborate on the steps required to purchase HBAR in the United States? I'm interested in understanding the process from start to finish, including any prerequisites, such as setting up a wallet or acquiring cryptocurrency to exchange for HBAR. Additionally, are there any specific exchanges or platforms that you recommend for buying HBAR in the USA? Also, please consider highlighting any potential risks or limitations that investors should be aware of before making such a purchase. I appreciate your insights and guidance on this topic.