I am currently working on an action plan for work. I would like to have my
main actions there at all times, and then at a click of a button I would like
the details to show.
For example.

Build a house
buy the wood
higher workers
find land

Buy a car
research cars
find a dealer

The things indented I would like to hide, and then the others I would like
to have showing at all times.

I am a very basic excel user, so please answer as detailed as possible.

Thanks in advance for your help!