Kamoroff book was the first em guide I bought over 20 years ago and a great book to get started.
Now check out pinrepair.com, still the best resource for troubleshooting and repair. Once you understand some basic principles the advice on this forum will become much easier to understand and valuable.
Learning to read schematics will save you many hours of hunting down problems. Joe's Classic Video Games on youtube has hands on troubleshooting and repair of em pinball games.
That's a great looking game. Welcome!