About cloudflare configuration

can i just add cloudflare by adding my site to it and add the cloudflare dns to my domain dns or there are more configuration should i take care of
thanks in advance

If you don’t plan to turn on the orange cloud then you don’t need to do any more.

If you do hope to use the orange cloud then it has to be disabled while setting up Let’s Encrypt and you will need to create a couple of page rules to prevent Cloudflare from breaking basic functionality within the page.