I'm incredulous. You are actually basing a life changing decision on MS Flight Sim and watching a Cockpit video.
Mate, I get bored watching those cockpit videos, which is why I've only ever watched one and that was about 15 years ago. Flight Sim? Don't even have it anymore. Cockpit videos are for spotters and can in no way convey what it is actually like to fly and operate an airliner.
What you don't see, amongst other things, is the mental challenges, the thought processes and the FEEL of doing it.
Fly into Chambery in a 146, thunderstorms, snow, ice, howling winds, severe turbulence and you'll be FLYING that poor old 146 more than you've ever flown anything before or since.
Bin the flight sim, bin those silly videos. Talk to people who actually do it ask them the questions you want answered, keep the dream alive.