How to use BitPay?

Hello there, I'm curious about using BitPay for my business transactions. Could you please explain to me, step by step, how to go about setting up an account with BitPay and utilizing it for receiving payments in cryptocurrency? I'm particularly interested in knowing about the verification process, how to generate invoices, and the process of converting those payments into my local currency. Additionally, are there any fees associated with using BitPay, and if so, how do they compare to traditional payment processors? I'd appreciate a comprehensive guide to help me get started with BitPay.