want to choose a career that lets me fly a large jet aircraft (Boeing 737, 787, 777) as soon as possible.
My advice is don’t get too tied up to wanting to fly those toys ‘as soon as possible’.
Spend your 20s in GA and then whatever happens after that. Because that’s likely how it will pan out.
There has been considerable hiring in recent years, which is now slowing down due to training delays, so there will be a large buildup of experienced GA and turboprop drivers flooding into these jet jobs over the next 5 years. Your aim would be to replace those people.
Just don’t get tied up on wanting to fly 737s pronto. Well not here locally anyway.