Editing the plugin

I explain to you what I would like:

When the user wants to post a project he clicks on Post Project in the menu he arrives here https://net-coop.fr/choix-metier/
He click on a thumbnail corresponding to the project he wishes to deposit (for the example only the first thumbnail Joinery is made)
When it clicks it arrives on a second page of more precise selection
https://net-coop.fr/choix-metier/project-menuiserie/ and when he clicks on his choice ( only the first thumbnail is made) he arrives on https://net-coop.fr/poster-un- project/
with the first Job Category field already on the value corresponding to the previous choices so for the example the field would already be on Joinery – Window.
So all the rest of the fields to fill below will correspond to this category.
The fields below are editable to display this or that parts according to the first choice.
for example for Painting we will display m2 of wall to paint etc … for Carpentry we display Number of windows etc …
All forms and fields I care about it I just want the “passage” of the value of the thumbnail (from this page https://net-coop.fr/choix-metier/projet-menuiserie/) to the first field which automatically gets on the right category.

if someone is able to do it (I think it’s too complicated to explain) please let me know the price.