How to buy using Unibot?

Hello there, could you please elaborate on the process of using Unibot to make a purchase? I'm particularly interested in understanding the steps involved from start to finish. Do I need to create an account with Unibot first? How do I go about adding funds to my account? Is there a specific way to select the cryptocurrency or asset I want to buy? And finally, what are the fees associated with using Unibot for transactions? I'd appreciate a clear and concise breakdown of the entire process.