bruh
These games make cars look simple and parts easy to get to, and like you can do everything with a wrench and screwdriver. Reality is, cars are a big mess under the hood, everything is covered in dirt, and there are lots of unconventional ways in which the parts are connected and how to get to them. You'd have to take apart like a hundred different cars to be able to tackle one without a manual. Haynes Manuals are your bible, or you can look up exactly what you need to do on youtube. Mechanic simulators don't teach you shit, except maybe that it's easy to forget something and then you have to repeat the whole job.