How do I buy cryptocurrencies on BitPay?

As a newcomer to the world of cryptocurrencies, I'm interested in understanding the process of purchasing them through BitPay. Could you please elaborate on the steps involved in buying digital currencies using this platform? Specifically, I'd like to know about account setup, verification procedures, funding options, choosing the right cryptocurrency, and the actual buying process. Additionally, are there any fees or limitations I should be aware of? I'd appreciate a step-by-step guide to ensure a smooth and secure transaction.