This video shows how to enable CloudFlare for a domain using Namecheap hosting.
You may also need to check:
How to connect a domain name to your Shared Hosting https://www.namecheap.com/support/knowledgebase/article.aspx/10237/2255/video-how-to-connect-a-domain-name-to-your-shared-hosting/
What are the domain DNS options? https://www.namecheap.com/support/knowledgebase/article.aspx/10284/2254/video-what-are-the-domain-dns-options/
How to change DNS for a domain https://www.namecheap.com/support/knowledgebase/article.aspx/767/10/how-to-change-dns-for-a-domain/
How to edit DNS zone in cPanel https://www.namecheap.com/support/knowledgebase/article.aspx/9256/29/how-to-edit-dns-zone-in-cpanel/
How to create DNS records on Cloudflare
https://developers.cloudflare.com/dns/manage-dns-records/how-to/create-dns-records/
Cloudflare plans and pricing https://www.cloudflare.com/plans/#overview
