+1 on any working machine that spits balls, keeps score, and doesn’t smoke or spark (a lot). I was an electronic technician in the Navy, so I do all my own repairs, but being faced with fixing a machine prior to playing it is not something you want to start out on, unless you like basket cases.
Get one that seems to be working, that is you can flip the flippers, it makes lights and sounds, and will spit out 3 balls in a row and score a game. Take it home, play it, figure out what ISN’T working, and try and fix one small thing at a time.
This is the best route in to the hobby in my opinion, and it helps to have an old pinhead fart go with you when you pick it up so you don’t get treated like a total nube. My first machine was Pinbot as well. Something from mid 80’s to 1990 is a good choice.
Good luck.