My brother is like this. Works in a bank. Very decent money. Always banging on about a career change. I just tell him not to be an idiot.
Most people would consider my career a rewarding one. I can tell you this for a fact. Some days it is, some days it’s drudgery, and some it’s just fucking awful.
If you are in a stable job, with reasonable prospects, I personally would advise looking at moving sideways or even downwards if necessary, to try another path within that.
Worrying about paying the bills is a lot worse than being bored at work.
If you can write, you can write in the evenings. If it were me, I’d offer to do some match reports for the local paper, any paper, for free. If it’s decent, you’ll be asked back. If you have an original voice, you’ll be noticed. Don’t be afraid to write the truth, though, like paul kimmage, it may not bring you happiness. If you slag off a local club league hero, you’ll make enemies fast enough I’d imagine.
Look at it this way, if Mr potato head can get a job as chief sports hack at a half decent publication like the Connacht tribune, then I’m sure you can. I wouldn’t chuck the golden goose away as a first up though.