Build a listing,classied app like craigslist, olx

Hi flutterflow comunitu !

I want to create a listing app like OLX ,avito , and I have a question :

1 - I have form for cars with 1-title 2-description 3-type of car(select widget) 4-transmission(select widget)

so for field 3-4 where I should create this data for select widget ? is this data type or I should create a colection for each select widget ? for example now I have a website creted with WordPress and jet engine where I have glossary and there I created each fields for my form and extract where I need .

2- if I have 10 categories with 10 subcategories every categories I should to create an form for each subcategories and page for each forms ?

or I can put all fields in one page and work with conditional visibility based select category (ex. forms cars have engine,color,transmidion / forms dog have age,gender,color ) ?