Greenscribe

I found the server name, and I changed that on Hawkhost, but it looks like I need to put in more information that I don't understand at Cloudflare to make this work. I logged in there and got this window. Can you tell me what I should put in these fields? I can't add the screenshot. I keep getting an error message (200) It asks for Use@for root - Mailserver - TTL - Priority (which I know is 0)

Thanks so much for your speedy reply. I'll go through what you explained, and hopefully, I'll be able to figure it out!

I recently added Cloudflare and changed the Nameservers as instructed by Cloudflare. But my email stopped coming to my home computer. I was told to add a MX record so that the emails will be pointed to Hawkhost. But I can't find where I'm supposed to do this! (I don't work on the backend of my sites-so I don't understand much of this). If someone can just give me the place to find where I add this information I will be forever thankful to you! (breadcrumbs might be helpful).