How do I put money in USDC?

Could you please explain the process to me of depositing funds into USDC? I'm a bit unfamiliar with the steps involved and would appreciate it if you could guide me through it. Is there a specific platform or wallet that I should use? Do I need to convert my fiat currency into another digital asset first? Are there any fees involved in the process? Also, how long does it usually take for the funds to reflect in my USDC balance? Thank you in advance for your assistance.