How do I use a global bitcoin object?

As a cryptocurrency enthusiast, I'm curious about how to effectively utilize a global bitcoin object. Could you elaborate on the steps involved in initializing and managing such an object? Specifically, I'm interested in understanding how to create a global bitcoin object, connect it to a network, handle wallet functionalities like sending and receiving transactions, and ensure its security. Additionally, I'd like to know if there are any best practices or considerations I should be aware of while working with a global bitcoin object. Your insights would be greatly appreciated in guiding me through this process.