Gravity Form Customisation

I have a GravityForms form that needs customisation.

There is a checkbox field in my form called "Flag For Review" with two selections: "Yes" and "No".

When "Flag For Review" is "Yes", I would like three functions to perform:

1) All required fields in the form become not required
2) All fields in the form become "Read Only"
3) The form background changes to an orange color

When "Flag For Review" is "No", I would like those three functions to return to normal:

1) All required fields in the form revert back to being required
2) All fields in the form are no longer "Read Only".
3) The form background changes back to normal

I have found the below script that might be a good starting place

https://docs.gravityforms.com/gform_pre_validation/?_ga=2.16395382.119518779.1677449576-822817920.1674107729#1-conditionally-required-field

That script, when properly configured , should address function 1 that I need performed. I need assistance getting function 1 performed using that script, and then need function 2 and 3 built on top of it.

In terms of GravityForms add-ons, I have plenty installed, including the Read Only add-on.