How to use WordPress as a Construction Site Diary?

There are no doubt many ways to do something like that, but this might be worth looking at:

https://www.ads-software.com/extend/plugins/wedevs-project-manager/

You could look for other “project management” plugins or there are certainly pretty advanced form plugins as well – search the plugins page.

Thanks WPyogi. I think I’m looking for something more like a cross between a form filler and a calendar, but a form that people can edit rather than just submit once.

Actually what I need is to be able to change the Post editing page so I can have multiple input fields that populate the Post, instead of just the one post editing field.

Will Custom Fields allow me to do that somehow?

I think this is what I’m after:
https://www.ads-software.com/extend/plugins/more-fields/
https://www.ads-software.com/extend/plugins/more-types/

Cool – be a bit cautious with those – they may not be compatible with current WP version – this one might be better = widely used and actively supported:

https://www.ads-software.com/extend/plugins/advanced-custom-fields/