How do I buy on Gate.io app?

Excuse me, I'm new to the world of cryptocurrency trading and I'm interested in buying on the Gate.io app. Could you please guide me through the process? I'm wondering how I can create an account, verify my identity, deposit funds, and finally make my first purchase. Is there any specific cryptocurrency that you recommend for beginners? Additionally, what are the fees associated with trading on Gate.io, and are there any security measures I should be aware of to protect my funds? I appreciate your help in navigating this process.