How do I get a coin from Coinbase?

Could you please explain in simple terms how I can acquire a cryptocurrency coin from Coinbase? I'm relatively new to this and would appreciate a step-by-step process. Should I create an account first? Once my account is set up, where do I go to buy my desired coin? Are there any fees or limits I should be aware of? Additionally, how do I ensure the safety of my transactions and the security of my funds once I've acquired the coin? Your guidance would be invaluable as I embark on this journey of exploring the cryptocurrency world.