I have uploaded a image onto the site but its not displaying

[Greenreader9]

If your using Cloudflare, you should be on Cloudflare Name Servers, not ns1 & ns2.epizy.com

Please follow this guide to set up Cloudflare correctly:

How to use cloudflare

When I make changes to my site in File Manager, will it update my website automatically? Or will I need to change my nameservers to InfinityFree every time I make a change, then back to CloudFlare,

Edit: Have these CNAME records as well:

Create two CNAME records, one with the name of @ and value of the Main Domain that you can find on the Control Panel, then another one with the name of www and value @. Save the changes and wait for DNS propagation.