WordPress Page Template Upgrade

I need to make some UI adjustments to several pages of our company's WP website to make it look more professional and tidy. I will provide reference websites for reference. Some elements can be directly used from the design content of the reference websites. The overall layout of the web pages does not need major changes, only some details need to be adjusted. There are approximately 3 pages. After completion, I need to create two new pages. I will provide detailed modification documents to explain each step of the modification. This is the first part of the task. During your completion process, I will prepare a second detailed development document, which is the second stage. The project is roughly divided into 4 stages. I need to complete one stage every day, so I need a person with sufficient time and professional WP developers. Thank you.