This is not the best way to obtain parts if you are making an electronic display item. To work with tiny components of modern smartphones, it takes years of experience and lots of equipment.
It’s also very expensive to salvage parts. Interfacing to a microcontroller is easy, except for the screen.
However, you could read up on electronics and buy breadboards with through hole components to build simple circuits.
You can build anything you want with 555 timer circuits.