You might find with your first pinball if its not running really well you will spend more time fixing it then playing it. But it depends if you like tinkering more then playing. In hindsite i should have paid the cashola and gotten someone to fix it, play it and then slowly learn about pinballs.
For me its way more fun playing pinballs rather then fixing them. Thats my 2 cents. Heaps of info about repairs are out there, just takes time.
System 11 are awesome games