Setting Up Email Inboxes with Cloudflare Instead of Google Suite

Is anyone using Cloudflare for all their domains and email inboxes instead of Google suite to avoid paying eight to $10 per inbox? I’m trying to set this up for my Agency but I’m having trouble understanding how to create a Gmail inbox using cloud flare. Anyone have any experience doing this trying to scale up a lot of emails and trying to avoid paying her inbox with Google because it is too expensive when you want to create 50 inbox.