I agree with ALMOST everything that you said, In my opinion - A large contractor does not afford better training or more opportunity in a lot of cases. If you can find a smaller company that does commercial /industrial (rather than straight up romex jockeys - residential only) the odds are in your favor that you will be given a much greater opportunity to learn and be involved.I use to complain about all the thieving / butchers that called themselves master electricians.
After the Great Recession , when building contractors (thieving / butchers also) went back to their manuf. plants and chicken farms
They kept me in business fixing their BS work when things got REALLY slow. The slowest I have seen it since starting on my own in 1988.
SO find a good electrical contractor (not a small one ) that is willing to train you properly, hopefully you can start part time .
Study the NEC like someones life depends on it.
Because ~ lives DO depend on you doing it correctly.
It is a good trade to have , money is decent. They say we are headed for a shortage of skilled tradesmen / craftsmen.
You will sometimes not get the respect you deserve for the the risks ( shock /electrocution / fire) involved . But being a fireman you may have experienced that already .

