How do I buy CR-V?

As a cryptocurrency enthusiast, I'm curious about the process of purchasing CR-V tokens. Could you walk me through the steps involved? Firstly, what platform or exchange should I use to acquire CR-V? Secondly, is there a minimum investment amount required? Additionally, what are the associated transaction fees and how can I ensure the security of my transaction? Lastly, how long does it typically take for the CR-V tokens to reflect in my account after a successful purchase? I'd appreciate a detailed explanation as I'm new to this space and want to make an informed decision.