Setup on Cloudflare

Hi there,

I am new to the setup of CDN’s, so please bear with me.

Ok, So I created my account with Cloudflare, and added the domain.
Up pops all the a/cname/mx etc, records it pulled from my domain.
Now in the Cloudflare dashboard, it wants me to ask my web hosts to change the nameservers to reflect the Cloudflare nameservers.

This is where I get a bit worried, as I have read that if one misconfigures on Cloudflare, you can mess up your email delivery.

Could anyone please point me to some decent documentation/posts that clearly explains the Cloudflare part of this setup.

Thanks in advance!