How to purchase on Bitrue?

I'm curious about the process of purchasing cryptocurrencies on Bitrue. Could you walk me through the steps from start to finish? Specifically, I'd like to know how to create an account, verify my identity, deposit funds, and finally, make a purchase. Are there any fees associated with these transactions, and how secure is the platform? I'm also interested in learning about the types of cryptocurrencies available for purchase on Bitrue and any special promotions or discounts that might be available for new users. Thanks in advance for your help!