Bug fix on a WordPress Site built on Elementor

I have a WP Website developed by someone that needs some updates and changes. I myself know something about programming and anticipate about 1 day if you know what you are doing.

Initially I gave the website to a person, but he is busy at the moment. The client has given a list of changes to do in the next two days and seeking your help to make it right and new

Please tell me what you need to start immediately,

Best Regards,
Arun