Where can I deposit coins?

Excuse me, I'm curious about depositing coins into a cryptocurrency wallet. Could you possibly guide me on where I can safely and securely make such a deposit? I've heard about various platforms and exchanges, but I'm not entirely sure which one would be the most suitable for me. Is there a particular wallet or exchange that you would recommend for beginners like myself? Additionally, what steps should I take to ensure the safety and security of my coins during the deposit process? Your insights would be greatly appreciated.