I dont have much hardware experience, but i am excellent at programming c and c++, and have some experience with electronics and arduino.
the application is like sorter, you say you want to put something at ceartin floor, see if the pushbutton is pushed, if not, it place the object, if yes it ask the user again and record everything.
Since you don't seem confident in the hardware side, please post a schematic of what you want to build, and you'll likely get (mostly) constructive feedback. No fritzing diagrams, please.
you can use a pen, an old envelope, and a few minutes of time. Mimic other schematics you see on line. + voltages at the top, gnd, or negative if you prefer, at the bottom. Signal flows left to right, so inputs (buttons, etc.) on the left, outputs (motors, solenoids, LEDs, etc.) on the right. Show all connections. When the sketch is done, take a photo and post it in a new message here.
Or, use any of the common free CAD packages, though that will involve a learning curve of it's own.
If you browse through the Tutorials section, you'll see some ideas to start from. I know there's a good posting on schematic creation, but this morning I don't seem to be able to find it.
Good luck!
Keep in mind, though you may not see the point in all that time and effort, a good schematic is the core go-to communication tool for electronics work, used by everyone 'in the profession' to ensure accuracy and completeness; if you're here to learn, it's a good place to start.