Responsive Design Issues - Improve UI UX (6 Pages, PHP)

Job ID: 30925772

Budget: £250 – £750 GBP

Bespoke designed lead generator site with errors (it's not WP).
We've just updated to CI v4.1.3 - JQ v3.6.0 - BS v5.0 - PHP v7.4
These updates left us with some errors (eg mobile view, word wrap etc...)
We are open to your thoughts and ideas how to improve UI UX/ Performance.
Happy to let you rethink the look and feel/ design - but - we essentially just need the fixes (see images).
If we agree, when could you start?
What are your pre-job, in-job and post-job policies and processes...?
What are the first few steps that we could expect from you?