Few simple steps:
Create free accout https://www.cloudflare.com/
Use ‘add a site’ option to move your domain to cloudflare and follow the simple instructions.
Carefully check and complete all records for DNS.
Add caching rules for your solution. Profit!
Service have a lot of features and setting, but more important for rapid start - works well from the scratch.
On the free plan you can add 3 rules sets for Page Rules, it’s quite enough for smooth start.
As are additional options/bonus you can turn on full proxy to your site (for DDoS protection), but be careful: for correct work with autorization, you may need some additional cloudflare rules setup.