While marriage is many things, it is anything but sentimental. Marriage is glorious but hard. It's a burning joy and strength, and yet it is also blood, sweat, and tears; humbling defeats and exhausting victories.
I became a manager very young. My first sous chef job I was, maybe, 25. It was a bit too early for me. But it's on-the-job training. You really just get stuck in there and it's trial and error. You learn by your mistakes, and hopefully you don't keep making them. And if you do, you just keep trying to fix it.