I am looking for a theme / template / widget / plugin

Hi, I just learned about WordPress and managed to somehow run it on my PC using a localhost IIS server.

I need a free theme/template/widget/plugin (don’t know what the difference between these things is!) that can help me build a real estate website. Maybe build is not the right word here because I will be using just copy/paste. *blush*
So I need something readily available and free.
The web site has to have on its front page a few drop down menus where customers can filter the type of property they are looking for by location, price, number of bedrooms, type of offer (rent or sale), type of property (house, condo), etc.
It should be something similar to this sample template here but for free: https://www.elegantthemes.com/preview/ElegantEstate
Or better yet this one: https://themeforest.net/item/openhouse-real-estate-automotiv-car-dealership/full_screen_preview/104662

The drop down search filters would be the most important part of the whole thing.

So, do you guys know any free themes/templates/widgets/plugins that have this drop-down functionality?