How do I use Box desktop?

I'm interested in learning how to use Box desktop to manage my files and collaborate with others. Can you walk me through the steps of setting up my account, navigating the user interface, and sharing files with others? I'm also curious about the security features of Box and how I can ensure my data is protected. Additionally, are there any best practices or tips for optimizing my Box desktop experience? I'd appreciate a comprehensive yet concise explanation that can help me get started with Box desktop.