Button/Switch Design - new to this, how to start?

I'm quite interested in designing a little button for myself and am not making any progress...

I have a rough understanding how it could work - but when I get to the mechanical details it all a brain fart. Who can help me/provide me with a book or tutorial on how to design the mechinal components of buttons/switches? Like:

- How does a spring fit into my design?

- How should the parts interact?

- What gears can I use?

- I think some ballpoint pens already have that mechanism thing figured out that I want - is there something I can look into especially for this? (I watched a video from the engineering guy and was a little surprised when he said that about 50 people worked on the first ballpoint pen mechanism)

Some more details of what I want to build:

- A button purely mechanical

- Size about 1-2 cm by 1-2 cm width

- It can be pushed and will always go back into the initial position

- The top changes with each push in color.

How would I get started? I feel like there are a ton of solutions, I have a few ideas but I'm stuck at how to actually go ahead and build a prototype or test out the mechanics...

submitted by /u/Marvin_The_Depressed
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