Well we can chat about that if you want, and why I got out of automotive :) Depends what your interests are. It's a highly regulated area and mfgs would rather sue joe home owner out of existence, than allow you to help people.
That said, tech life is not easy. Most guys get into it because its another trade for kids that don't know what they wanna do. It pays better than many trades but is hard work too. MFGs try everything they can to squeeze money out of dealerships and repair shops as well. While theyre forced to offer tools for repair by the government, it doesn't specify what ways they can offer it.
At some point Ford engineer gave us a megashare link to a firmware download for something one of our techs was working on. (funny story Siglent recently sent me a megashare link for a firmware recovery package XD)
For our shop, it was run buy guys who were highly motivated (3 of us started the show, I was just an employee though). We were one of the most expensive repair shops though, and generally turn down small jobs like the equivalent of your situation.
Dealership techs are usually a different story though. I've been offered tech jobs and declined because the work sucks relatively speaking in the trades. Usually the pay is lower because dealerships don't make much money in comparison to 3rd party shops. They have more overhead, mandatory warranty work (they usually lose money on) and they are required to set repair pricing based on the mfg book time which usually isn't enough for the dealership to make much on, despite it feeling like they are telling you to bite the pillow. Dealerships make money on sales, not service, may around here avoid service as much as possible. That and for the past few years they have been short staffed and hiring kids fresh out of tech school.
My experience was mostly in calibration firmware engineering (or reverse engineering).