How to add USDC E to MetaMask?

How might one successfully add USDC E to MetaMask? Could you please provide a step-by-step guide for those who are unfamiliar with the process? Is it necessary to have a pre-existing MetaMask wallet set up before attempting this? Also, are there any specific requirements or considerations that should be taken into account when adding USDC E? Additionally, could you clarify any potential fees or charges associated with this process? Finally, is there a recommended amount of USDC E that should be added initially, or can it vary depending on individual needs?