Joystick and finishing cabinet help

[dsasfai]

Hi, 

New to the forum.   Just built a cabinet for the family for xmas and very excited to get it up and running.   It looks great however I'm at the point where I need to finish the control panel and get it up and running and gotta admit I'm kind of out of my league.   LOL.  So I have a few questions.

1.  I installed a suzohapp joystick with the microswitches on the bottom.   One of the joysticks i noticed isn't completely depressing the microchip on bottom or it isn't clicking completely.   Not sure if that means its not going to work?   Also don't really understand the difference between 4 way vs. 8 way.   Is that something that will affect the games I want my machine to play?

2.  I also bought the raspberry pi 3 model B with 32 GB preloaded card with NOOBS and Retropie.   I also bought a 128 GB card cause I didn't realize that the 32 came in the kit.   Wandering if I should go with the 128 instead so I can fit more games etc.   And Is there a tutorial on how to set that up the raspberry?   Also can I set it up with hyperspin?

Thanks for any help.

Doug