PHP and Wordpress work

I've an Wordpress website Website like: [login to view URL] My Website: [login to view URL] Requirements: 1. As a visitor, i want put my license plate number and click on the button ‘volgende’ the system most take my car details from the API. - Make it possible that visitors can type the car number plate in the yellow location. When they press next, car data is retrieved and displayed on the next page. For the data i use the plugin “open_data_rdw”. 2. As a visitor, I do not know my license plate number and I want to enter my car brand data manually. - When visitor click on “Ik weet mijn Kenteken niet” link to subview or subpage where visitor can choose this option (like [login to view URL]): - Merk (Dropdown data from RDW, use the plugin data.) When choose Merk the Model option will be available. - Model (Dropdown data from RDW, use the plugin data.) - Bouwjaar (dropdown: start ‘older 2000’ and end ‘2018’ make easy possible to add 2019 ) - Brandstof (dropdown: ‘Benzine” “Diesel” “Elektrisch of Hybride” “LPG” “Overige Brandstof”) When all part are choosing and the visitor can click on button ‘volgende’ for the carpage. On carpage the visitor most fill all the form. Top of the page will be the information what he choose before and down the new information. (for more information i use the contact form 7 plugin) 3. Change on the carpage the upload button to image like this, use other image, under image have maybe copyright: Image 4. Optimize car page and make the views nice and more structured. Change carpage into 2 parts, - car data. (top of the page information what the visitor choose before and down other choosing option) - personal details (Personal details must be on the next page. Like [login to view URL]) Change Image Change Image Optimize car page and make the views nice and more structured: [login to view URL] 5. All data most be send it correct by email i use contact form plugin 7 for this. It works by now, except the appreciation. Please note that you must keep track of all changes. I need to know which file you changed, so that I can release it on production version.