How to buy manta on Coinbase?

Hello, I'm a bit of a crypto newbie and I've been hearing a lot about Manta lately. Could you please explain to me in simple terms how I can purchase Manta tokens on Coinbase? I've already set up an account on the platform but I'm not sure what the next steps are. Do I need to do any specific trading or convert other currencies first? I'd really appreciate a step-by-step guide to help me navigate this process. Also, are there any fees or charges associated with buying Manta on Coinbase? Thank you for your assistance.