Need help about llc

hello guys,

I want to form an LLC for the Amazon wholesale business. I am from Bangladesh. Which company do you think will be best for me to form an LLC for Amazon purpose? And can i use registered agent address for amazon account and mercury bank account? Or do i have to buy a physical address?

One more question is can i do whole in the UK by registering a LTD in the UK? Since its much cheaper.

thank you