take a look at this for an idea of what you need. Substitute the sanwa buttons for similar buttons of the same size.

The Brook Zero Pi is cheap, supports the switch, and doesn't need soldering (make sure you get the version with the screw terminals).

you will need a crimping/stripper tool and quick disconnects .187 or 4.8mm and wire (if you have old ethernet cables you could use the 8 wires from that)

Good luck with your build and post it when you are done.

I used these to connect to my wires to all spade connectors:

https://www.amazon.com/gp/product/B01962MW2G/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B01N0M6PP1/ref=ppx_yo_dt_b_asin_title_o09_s01?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B01G408A4M/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1