Where to buy Moonbeam in the US?

I'm interested in purchasing Moonbeam cryptocurrency, but I'm not sure where I can do so in the United States. Could you please provide some guidance on reputable exchanges or platforms where I can safely buy Moonbeam? I'm particularly concerned about security and ease of use, so any recommendations that prioritize these factors would be greatly appreciated. Additionally, are there any potential fees or restrictions I should be aware of before making a purchase? Thank you for your help!